HackerRank MySQL - Weather Observation Station 15

Query the Western Longitude (LONG_W) for the largest Northern Latitude (LAT_N) in STATION that is less than 137.2345. Round your answer to 4 decimal places.

SELECT ROUND(LONG_W, 4)
FROM STATION
WHERE LAT_N =
    (SELECT MAX(LAT_N)
     FROM STATION
     WHERE LAT_N < 137.2345);