Finding the Fourth Proportional to 1,123.18, 1,549.35 and 997.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.18 : 1,549.35 = 997.24 : x
2. Step 2: Convert to fraction form
   1,123.18/1,549.35 = 997.24/x
3. Step 3: Cross multiply
   1,123.18x = 1,549.35 × 997.24
4. Step 4: Simplify right side
   1,123.18x = 1,545,073.79
5. Step 5: Solve for x
   x = 1,545,073.79/1,123.18
6. Step 6: Final answer
   x = 1,375.62