Finding the Fourth Proportional to 1,123.92, 1,550.83 and 626.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.92 : 1,550.83 = 626.55 : x
2. Step 2: Convert to fraction form
   1,123.92/1,550.83 = 626.55/x
3. Step 3: Cross multiply
   1,123.92x = 1,550.83 × 626.55
4. Step 4: Simplify right side
   1,123.92x = 971,668.66
5. Step 5: Solve for x
   x = 971,668.66/1,123.92
6. Step 6: Final answer
   x = 864.53