Finding the Fourth Proportional to 1,123.70, 1,550.82 and 626.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.70 : 1,550.82 = 626.42 : x
2. Step 2: Convert to fraction form
   1,123.70/1,550.82 = 626.42/x
3. Step 3: Cross multiply
   1,123.70x = 1,550.82 × 626.42
4. Step 4: Simplify right side
   1,123.70x = 971,464.66
5. Step 5: Solve for x
   x = 971,464.66/1,123.70
6. Step 6: Final answer
   x = 864.52