Finding the Fourth Proportional to 11,123.32, 15,344.02 and 7,139.96

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.32 : 15,344.02 = 7,139.96 : x
2. Step 2: Convert to fraction form
   11,123.32/15,344.02 = 7,139.96/x
3. Step 3: Cross multiply
   11,123.32x = 15,344.02 × 7,139.96
4. Step 4: Simplify right side
   11,123.32x = 109,555,689.04
5. Step 5: Solve for x
   x = 109,555,689.04/11,123.32
6. Step 6: Final answer
   x = 9,849.19