Wells Fargo & Co. reported a 22 percent increase in its third-quarter profit this morning on a surge in mortgage lending but fell short of analysts' revenue estimates, Reuters reported. Shares in the fourth-largest U.S. bank dropped 3.3 percent to $34.02 in premarket trading. Wells Fargo posted earnings per share of 88 cents, topping analysts' consensus estimate of 87 cents, according to Thomson Reuters.But total revenue of $21.2 billion fell short of the $21.47 billion that analysts had expected. Net income in the quarter was a record $4.9 billion. Mortgage banking revenue jumped more than 50 percent from a year ago to $2.8 billion.