Finding the Fourth Proportional to 10,581.59, 15,872.90 and 8,729.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,581.59 : 15,872.90 = 8,729.27 : x
2. Step 2: Convert to fraction form
   10,581.59/15,872.90 = 8,729.27/x
3. Step 3: Cross multiply
   10,581.59x = 15,872.90 × 8,729.27
4. Step 4: Simplify right side
   10,581.59x = 138,558,825.82
5. Step 5: Solve for x
   x = 138,558,825.82/10,581.59
6. Step 6: Final answer
   x = 13,094.33