Finding the Fourth Proportional to 1,123.56, 1,550.42 and 626.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.56 : 1,550.42 = 626.16 : x
2. Step 2: Convert to fraction form
   1,123.56/1,550.42 = 626.16/x
3. Step 3: Cross multiply
   1,123.56x = 1,550.42 × 626.16
4. Step 4: Simplify right side
   1,123.56x = 970,810.99
5. Step 5: Solve for x
   x = 970,810.99/1,123.56
6. Step 6: Final answer
   x = 864.05