By Reuters Staff 3 Min Read (Reuters) - Luxury electric vehicle maker Lucid Motors on Monday agreed to go public by merging with blank-check firm Churchill Capital IV Corp in a deal that valued the combined company at a pro-forma equity value of $24 billion. FILE PHOTO: The Lucid Air speed test car is displayed at the 2017 New York International Auto Show in New York City, U.S. April 13, 2017. REUTERS/Andrew Kelly Lucid, run by an ex-Tesla engineer, is the latest firm to tap the initial public offering market, with investors rushing into the EV sector, spurred by the rise of Tesla Inc and wit...