Finding the Fourth Proportional to 10,124.53, 15,160.16 and 8,139.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,124.53 : 15,160.16 = 8,139.62 : x
2. Step 2: Convert to fraction form
   10,124.53/15,160.16 = 8,139.62/x
3. Step 3: Cross multiply
   10,124.53x = 15,160.16 × 8,139.62
4. Step 4: Simplify right side
   10,124.53x = 123,397,999.79
5. Step 5: Solve for x
   x = 123,397,999.79/10,124.53
6. Step 6: Final answer
   x = 12,188.03