Finding the Fourth Proportional to 10,115.09, 15,131.98 and 8,743.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,115.09 : 15,131.98 = 8,743.15 : x
2. Step 2: Convert to fraction form
   10,115.09/15,131.98 = 8,743.15/x
3. Step 3: Cross multiply
   10,115.09x = 15,131.98 × 8,743.15
4. Step 4: Simplify right side
   10,115.09x = 132,301,170.94
5. Step 5: Solve for x
   x = 132,301,170.94/10,115.09
6. Step 6: Final answer
   x = 13,079.58