Finding the Fourth Proportional to 1,689.57, 2,528.17 and 996.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.57 : 2,528.17 = 996.55 : x
2. Step 2: Convert to fraction form
   1,689.57/2,528.17 = 996.55/x
3. Step 3: Cross multiply
   1,689.57x = 2,528.17 × 996.55
4. Step 4: Simplify right side
   1,689.57x = 2,519,447.81
5. Step 5: Solve for x
   x = 2,519,447.81/1,689.57
6. Step 6: Final answer
   x = 1,491.18