Finding the Fourth Proportional to 10,757.72, 16,139.62 and 9,729.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,757.72 : 16,139.62 = 9,729.56 : x
2. Step 2: Convert to fraction form
   10,757.72/16,139.62 = 9,729.56/x
3. Step 3: Cross multiply
   10,757.72x = 16,139.62 × 9,729.56
4. Step 4: Simplify right side
   10,757.72x = 157,031,401.17
5. Step 5: Solve for x
   x = 157,031,401.17/10,757.72
6. Step 6: Final answer
   x = 14,597.09