Finding the Fourth Proportional to 1,123.54, 1,550.53 and 626.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.54 : 1,550.53 = 626.30 : x
2. Step 2: Convert to fraction form
   1,123.54/1,550.53 = 626.30/x
3. Step 3: Cross multiply
   1,123.54x = 1,550.53 × 626.30
4. Step 4: Simplify right side
   1,123.54x = 971,096.94
5. Step 5: Solve for x
   x = 971,096.94/1,123.54
6. Step 6: Final answer
   x = 864.32