Finding the Fourth Proportional to 15,581.52, 21,501.72 and 8,507.88

Step by Step Solution

1. Step 1: Write the proportion equation
   15,581.52 : 21,501.72 = 8,507.88 : x
2. Step 2: Convert to fraction form
   15,581.52/21,501.72 = 8,507.88/x
3. Step 3: Cross multiply
   15,581.52x = 21,501.72 × 8,507.88
4. Step 4: Simplify right side
   15,581.52x = 182,934,053.55
5. Step 5: Solve for x
   x = 182,934,053.55/15,581.52
6. Step 6: Final answer
   x = 11,740.45