July 26 (Reuters) - Fiserv FI.N on Wednesday raised its full-year adjusted profit outlook above Wall Street expectations as the financial services company reported second-quarter results ahead of estimates. Americans have so far managed to withstand inflationary pressures that have led to an increase in prices of everything from groceries to energy, and have continued to spend on travel and dining out. "We delivered our ninth consecutive quarter of double-digit organic revenue growth, as we sustained our momentum in merchant acceptance and expanded our digital payments," CEO Frank Bisignano said.