Dropbox Inc (NASDAQ:DBX) stock is trading higher after the company reported better-than-expected second-quarter financial results Thursday. The results came during an exciting earnings season. Here are key analyst takeaways. Goldman Sachs Kash Rangan reiterated a Sell rating while lowering his price target to $20 from $22. RBC Capital Markets analyst Rishi Jaluria maintained an Outperform rating with a price target of $32. Goldman Sachs: Dropbox gained after marginally beating the consensus in ARPU, paying users, revenue, and adjusted operating margins, Rangan noted. The company slightly raise…