Finding the Fourth Proportional to 1,123.43, 1,550.22 and 625.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.43 : 1,550.22 = 625.98 : x
2. Step 2: Convert to fraction form
   1,123.43/1,550.22 = 625.98/x
3. Step 3: Cross multiply
   1,123.43x = 1,550.22 × 625.98
4. Step 4: Simplify right side
   1,123.43x = 970,395.83
5. Step 5: Solve for x
   x = 970,395.83/1,123.43
6. Step 6: Final answer
   x = 863.78