Finding the Fourth Proportional to 12,531.72, 17,285.48 and 8,061.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,531.72 : 17,285.48 = 8,061.12 : x
2. Step 2: Convert to fraction form
   12,531.72/17,285.48 = 8,061.12/x
3. Step 3: Cross multiply
   12,531.72x = 17,285.48 × 8,061.12
4. Step 4: Simplify right side
   12,531.72x = 139,340,328.54
5. Step 5: Solve for x
   x = 139,340,328.54/12,531.72
6. Step 6: Final answer
   x = 11,119.01