Finding the Fourth Proportional to 22,963.29, 31,687.15 and 12,889.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,963.29 : 31,687.15 = 12,889.42 : x
2. Step 2: Convert to fraction form
   22,963.29/31,687.15 = 12,889.42/x
3. Step 3: Cross multiply
   22,963.29x = 31,687.15 × 12,889.42
4. Step 4: Simplify right side
   22,963.29x = 408,428,873.51
5. Step 5: Solve for x
   x = 408,428,873.51/22,963.29
6. Step 6: Final answer
   x = 17,786.17