Finding the Fourth Proportional to 1,123.52, 1,550.26 and 626.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.52 : 1,550.26 = 626.15 : x
2. Step 2: Convert to fraction form
   1,123.52/1,550.26 = 626.15/x
3. Step 3: Cross multiply
   1,123.52x = 1,550.26 × 626.15
4. Step 4: Simplify right side
   1,123.52x = 970,687.72
5. Step 5: Solve for x
   x = 970,687.72/1,123.52
6. Step 6: Final answer
   x = 863.97