A 23.6 g marble sliding to the right at 21.0 cm/s overtakes and collides with a 10.2 g marble moving in the same direction at 11.4 cm/s. After the collision, the 10.2 marble moves to the right at 23.6 cm/s.

Find the velocity of the 23.6 g marble after the collision.

Answer in units of cm/s.