Woburn-based LogMeIn Inc., a provider of cloud and mobile services, posted third-quarter earnings and revenue that beat Wall Street estimates. Total revenue increased 14 percent to $35.4 million, up from $31.0 million in the third quarter of 2011. Total subscription revenue rose 21 percent to $34.9 million from a prior $28.8 million. Adjusted net income was $4.6 million, or $0.18 per share. Analysts expected profit of 16 cents per share on revenue of $35.13 million. The company expects fourth-quarter revenue to be in the range of $36.4 million to $36.8 million.