Finding the Fourth Proportional to 12,520.86, 17,284.23 and 8,321.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,520.86 : 17,284.23 = 8,321.82 : x
2. Step 2: Convert to fraction form
   12,520.86/17,284.23 = 8,321.82/x
3. Step 3: Cross multiply
   12,520.86x = 17,284.23 × 8,321.82
4. Step 4: Simplify right side
   12,520.86x = 143,836,250.90
5. Step 5: Solve for x
   x = 143,836,250.90/12,520.86
6. Step 6: Final answer
   x = 11,487.73