LG Electronics Inc beat analyst estimates by doubling its fourth-quarter profit, as heavy promotional activity in the U.S.s Black Friday shopping season lifted TV sales, offsetting a small loss at its mobile arm. Operating profit totaled 238 billion won ($220 million) in October-December, the worlds second-biggest TV maker after Samsung Electronics Co Ltd said in a statement on Monday. That compared with the 223 billion won estimate of 35 analysts polled by Thomson Reuters I/B/E/S, as well as the 117 billion won of a year earlier and 218 billion won of July-September.