SEOUL, LG Electronics Inc. on Monday estimated its fourth-quarter operating profit at 312.5 billion won (US$237.3 million), up 350.9 percent from a year earlier. Revenue increased 5.9 percent to 23.15 trillion won. The data for net earnings was not available. The operating profit was 36.7 percent lower than the average estimate, according to a survey by Yonhap Infomax, the financial data firm of Yonhap News Agency. The company will release its final earnings report later. Source: Yonhap News Agency