Finding the Fourth Proportional to 22,117.50, 30,522.42 and 12,686.94

Step by Step Solution

1. Step 1: Write the proportion equation
   22,117.50 : 30,522.42 = 12,686.94 : x
2. Step 2: Convert to fraction form
   22,117.50/30,522.42 = 12,686.94/x
3. Step 3: Cross multiply
   22,117.50x = 30,522.42 × 12,686.94
4. Step 4: Simplify right side
   22,117.50x = 387,236,111.19
5. Step 5: Solve for x
   x = 387,236,111.19/22,117.50
6. Step 6: Final answer
   x = 17,508.13