Finding the Fourth Proportional to 22,541.72, 31,109.90 and 12,981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,541.72 : 31,109.90 = 12,981.92 : x
2. Step 2: Convert to fraction form
   22,541.72/31,109.90 = 12,981.92/x
3. Step 3: Cross multiply
   22,541.72x = 31,109.90 × 12,981.92
4. Step 4: Simplify right side
   22,541.72x = 403,866,233.01
5. Step 5: Solve for x
   x = 403,866,233.01/22,541.72
6. Step 6: Final answer
   x = 17,916.39