Let the fourth term be x.
Thus 56, 16, 49, x are in proportion.
Product of extreme terms = 56 ×x
Product of mean terms = 16 X 49
Since, the numbers make up a proportion
Therefore, 56 × x = 16 × 49
or, x = (16 × 49)/56
or, x = 14
Therefore, the fourth term of the proportion is 14.