Finding the Fourth Proportional to 1,036.16, 1,553.28 and 458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.16 : 1,553.28 = 458.72 : x
2. Step 2: Convert to fraction form
   1,036.16/1,553.28 = 458.72/x
3. Step 3: Cross multiply
   1,036.16x = 1,553.28 × 458.72
4. Step 4: Simplify right side
   1,036.16x = 712,520.60
5. Step 5: Solve for x
   x = 712,520.60/1,036.16
6. Step 6: Final answer
   x = 687.65