730 - 658 = 72

874 - 730 = 144 ===> (7×2)(2×2) = (14)(4).

1162 - 874 = 288 ===> (14×2)(4×2) = (28)(8)

Continuing with this pattern the next difference should be (28×2)(8×2)

(56)(16) {2nd bracket should only have 1 digit, therefore the tens place of 16 is carried over to the 1st bracket} ====> 576

Therefore the required number is 1162 + 576 =**1738**.

To check if this holds good the next difference is

(57×2)(6×2) ===> (114)(12) ===> (1152)

Now 1738 + 1152 = 2890, which means that the answer must be right.