Finding the Fourth Proportional to 22,116.69, 30,516.12 and 12,685.26

Step by Step Solution

1. Step 1: Write the proportion equation
   22,116.69 : 30,516.12 = 12,685.26 : x
2. Step 2: Convert to fraction form
   22,116.69/30,516.12 = 12,685.26/x
3. Step 3: Cross multiply
   22,116.69x = 30,516.12 × 12,685.26
4. Step 4: Simplify right side
   22,116.69x = 387,104,916.39
5. Step 5: Solve for x
   x = 387,104,916.39/22,116.69
6. Step 6: Final answer
   x = 17,502.84