Finding the Fourth Proportional to 1,123.52, 1,549.80 and 657.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.52 : 1,549.80 = 657.68 : x
2. Step 2: Convert to fraction form
   1,123.52/1,549.80 = 657.68/x
3. Step 3: Cross multiply
   1,123.52x = 1,549.80 × 657.68
4. Step 4: Simplify right side
   1,123.52x = 1,019,272.46
5. Step 5: Solve for x
   x = 1,019,272.46/1,123.52
6. Step 6: Final answer
   x = 907.21