Finding the Fourth Proportional to 12,708.86, 17,549.76 and 8,240.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708.86 : 17,549.76 = 8,240.10 : x
2. Step 2: Convert to fraction form
   12,708.86/17,549.76 = 8,240.10/x
3. Step 3: Cross multiply
   12,708.86x = 17,549.76 × 8,240.10
4. Step 4: Simplify right side
   12,708.86x = 144,611,777.38
5. Step 5: Solve for x
   x = 144,611,777.38/12,708.86
6. Step 6: Final answer
   x = 11,378.82