Finding the Fourth Proportional to 10,656.01, 15,992.27 and 8,581.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,656.01 : 15,992.27 = 8,581.10 : x
2. Step 2: Convert to fraction form
   10,656.01/15,992.27 = 8,581.10/x
3. Step 3: Cross multiply
   10,656.01x = 15,992.27 × 8,581.10
4. Step 4: Simplify right side
   10,656.01x = 137,231,209.59
5. Step 5: Solve for x
   x = 137,231,209.59/10,656.01
6. Step 6: Final answer
   x = 12,878.30