Finding the Fourth Proportional to 1,123.88, 1,551.15 and 658.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.88 : 1,551.15 = 658.13 : x
2. Step 2: Convert to fraction form
   1,123.88/1,551.15 = 658.13/x
3. Step 3: Cross multiply
   1,123.88x = 1,551.15 × 658.13
4. Step 4: Simplify right side
   1,123.88x = 1,020,850.59
5. Step 5: Solve for x
   x = 1,020,850.59/1,123.88
6. Step 6: Final answer
   x = 908.33