Finding the Fourth Proportional to 1,123.62, 1,550.68 and 626.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.62 : 1,550.68 = 626.38 : x
2. Step 2: Convert to fraction form
   1,123.62/1,550.68 = 626.38/x
3. Step 3: Cross multiply
   1,123.62x = 1,550.68 × 626.38
4. Step 4: Simplify right side
   1,123.62x = 971,314.94
5. Step 5: Solve for x
   x = 971,314.94/1,123.62
6. Step 6: Final answer
   x = 864.45