Finding the Fourth Proportional to 1,123.30, 1,549.92 and 657.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.30 : 1,549.92 = 657.56 : x
2. Step 2: Convert to fraction form
   1,123.30/1,549.92 = 657.56/x
3. Step 3: Cross multiply
   1,123.30x = 1,549.92 × 657.56
4. Step 4: Simplify right side
   1,123.30x = 1,019,165.40
5. Step 5: Solve for x
   x = 1,019,165.40/1,123.30
6. Step 6: Final answer
   x = 907.30