Bolstered by new and revamped fitness products, Nautilus Inc. on Monday vaulted into territory that has long eluded it: profitability.The Vancouver-based maker of fitness equipment reported a profit of roughly $3.2 million for the three-month period ended Dec. 31, or 10 cents per share. The company broke even in 2010’s fourth quarter.For all of 2011, Nautilus posted a profit of $1.4 million. By contrast, the company saw a net loss of $22.8 million for all of 2010.The company’s financial results mark “a quantum improvement over prior years and puts us on a path towards sustained profitable growth,” Bruce Cazenave, chief executive of Nautilus, said in a news release.The company, which employs 320 people — most of whom work in Vancouver and Portland — reported fourth-quarter net sales of $60 million. That’s up 11.7 percent from net sales of $53.7 million during the same October-through-December period in 2010.For all of 2011, the company had net sales of roughly $180.4 million — a 7.1 percent increase from $168.5 million in net sales for all of 2010.The company’s direct-to-consumer business — which reaches consumers through TV and online media advertising — reported fourth-quarter net sales of $31.7 million, an increase of 12.4 percent year over year.Driving that increase was strong demand for the company’s TreadClimber cardio machines. Stoking that demand were two forces, according to Nautilus: increased advertising effectiveness and higher consumer credit approval rates.