Finding the Fourth Proportional to 12,087.61, 18,132.33 and 7,861.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.61 : 18,132.33 = 7,861.24 : x
2. Step 2: Convert to fraction form
   12,087.61/18,132.33 = 7,861.24/x
3. Step 3: Cross multiply
   12,087.61x = 18,132.33 × 7,861.24
4. Step 4: Simplify right side
   12,087.61x = 142,542,597.89
5. Step 5: Solve for x
   x = 142,542,597.89/12,087.61
6. Step 6: Final answer
   x = 11,792.46