Finding the Fourth Proportional to 22,117.52, 30,522.42 and 12,686.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,117.52 : 30,522.42 = 12,686.96 : x
2. Step 2: Convert to fraction form
   22,117.52/30,522.42 = 12,686.96/x
3. Step 3: Cross multiply
   22,117.52x = 30,522.42 × 12,686.96
4. Step 4: Simplify right side
   22,117.52x = 387,236,721.64
5. Step 5: Solve for x
   x = 387,236,721.64/22,117.52
6. Step 6: Final answer
   x = 17,508.14