Finding the Fourth Proportional to 23,061.29, 31,824.70 and 12,989.86

Step by Step Solution

1. Step 1: Write the proportion equation
   23,061.29 : 31,824.70 = 12,989.86 : x
2. Step 2: Convert to fraction form
   23,061.29/31,824.70 = 12,989.86/x
3. Step 3: Cross multiply
   23,061.29x = 31,824.70 × 12,989.86
4. Step 4: Simplify right side
   23,061.29x = 413,398,285.51
5. Step 5: Solve for x
   x = 413,398,285.51/23,061.29
6. Step 6: Final answer
   x = 17,926.07