Finding the Fourth Proportional to 1,123.49, 1,550.49 and 626.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.49 : 1,550.49 = 626.21 : x
2. Step 2: Convert to fraction form
   1,123.49/1,550.49 = 626.21/x
3. Step 3: Cross multiply
   1,123.49x = 1,550.49 × 626.21
4. Step 4: Simplify right side
   1,123.49x = 970,940.30
5. Step 5: Solve for x
   x = 970,940.30/1,123.49
6. Step 6: Final answer
   x = 864.22