Finding the Fourth Proportional to 1,123.30, 1,550.16 and 625.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.30 : 1,550.16 = 625.96 : x
2. Step 2: Convert to fraction form
   1,123.30/1,550.16 = 625.96/x
3. Step 3: Cross multiply
   1,123.30x = 1,550.16 × 625.96
4. Step 4: Simplify right side
   1,123.30x = 970,338.15
5. Step 5: Solve for x
   x = 970,338.15/1,123.30
6. Step 6: Final answer
   x = 863.83