Finding the Fourth Proportional to 1,123.50, 1,550.46 and 657.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.50 : 1,550.46 = 657.78 : x
2. Step 2: Convert to fraction form
   1,123.50/1,550.46 = 657.78/x
3. Step 3: Cross multiply
   1,123.50x = 1,550.46 × 657.78
4. Step 4: Simplify right side
   1,123.50x = 1,019,861.58
5. Step 5: Solve for x
   x = 1,019,861.58/1,123.50
6. Step 6: Final answer
   x = 907.75