Finding the Fourth Proportional to 1,155.28, 1,593.92 and 689.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.28 : 1,593.92 = 689.52 : x
2. Step 2: Convert to fraction form
   1,155.28/1,593.92 = 689.52/x
3. Step 3: Cross multiply
   1,155.28x = 1,593.92 × 689.52
4. Step 4: Simplify right side
   1,155.28x = 1,099,039.72
5. Step 5: Solve for x
   x = 1,099,039.72/1,155.28
6. Step 6: Final answer
   x = 951.32