Finding the Fourth Proportional to 1,123.50, 1,550.42 and 626.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.50 : 1,550.42 = 626.10 : x
2. Step 2: Convert to fraction form
   1,123.50/1,550.42 = 626.10/x
3. Step 3: Cross multiply
   1,123.50x = 1,550.42 × 626.10
4. Step 4: Simplify right side
   1,123.50x = 970,722.69
5. Step 5: Solve for x
   x = 970,722.69/1,123.50
6. Step 6: Final answer
   x = 864.02