One part is obvious: that the initial digit increases with each term, so the missing term will start with a 6. The other part is that the product of the digits of each number is the same number but with the initial digit omitted, eg 4x3x8x4=384. Specifically each term is the smallest it could be (excluding the use of 0). So the missing term will be 612.
11, 236, 315, 4384, 5175, 612, 7735, 8128, 9135