Finding the Fourth Proportional to 12,684.42, 17,508.51 and 8,711.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,684.42 : 17,508.51 = 8,711.10 : x
2. Step 2: Convert to fraction form
   12,684.42/17,508.51 = 8,711.10/x
3. Step 3: Cross multiply
   12,684.42x = 17,508.51 × 8,711.10
4. Step 4: Simplify right side
   12,684.42x = 152,518,381.46
5. Step 5: Solve for x
   x = 152,518,381.46/12,684.42
6. Step 6: Final answer
   x = 12,024.07