Finding the Fourth Proportional to 1,123.63, 1,550.46 and 626.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.63 : 1,550.46 = 626.20 : x
2. Step 2: Convert to fraction form
   1,123.63/1,550.46 = 626.20/x
3. Step 3: Cross multiply
   1,123.63x = 1,550.46 × 626.20
4. Step 4: Simplify right side
   1,123.63x = 970,899.57
5. Step 5: Solve for x
   x = 970,899.57/1,123.63
6. Step 6: Final answer
   x = 864.08