Finding the Fourth Proportional to 12,521.14, 17,272.20 and 8,039.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,521.14 : 17,272.20 = 8,039.86 : x
2. Step 2: Convert to fraction form
   12,521.14/17,272.20 = 8,039.86/x
3. Step 3: Cross multiply
   12,521.14x = 17,272.20 × 8,039.86
4. Step 4: Simplify right side
   12,521.14x = 138,866,069.89
5. Step 5: Solve for x
   x = 138,866,069.89/12,521.14
6. Step 6: Final answer
   x = 11,090.53