Finding the Fourth Proportional to 1,123.72, 1,550.86 and 626.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.72 : 1,550.86 = 626.44 : x
2. Step 2: Convert to fraction form
   1,123.72/1,550.86 = 626.44/x
3. Step 3: Cross multiply
   1,123.72x = 1,550.86 × 626.44
4. Step 4: Simplify right side
   1,123.72x = 971,520.74
5. Step 5: Solve for x
   x = 971,520.74/1,123.72
6. Step 6: Final answer
   x = 864.56