CREATE TABLE table_74429 ("Date" TEXT, "Episode" FLOAT, "Official rating 4+" TEXT, "Share 4+" TEXT, "Official rating 16-39" TEXT, "Share 16-39" TEXT)

What is the official 4+ rating of the episode with a 16-39 share of 24,59%?
SELECT "Official rating 4+" FROM table_74429 WHERE "Share 16-39" = '24,59%'
SELECT "Official rating 4+" FROM "table_74429" WHERE "Share 16-39" = '24,59%'