Finding the Fourth Proportional to 22,963.16, 31,686.98 and 12,889.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,963.16 : 31,686.98 = 12,889.29 : x
2. Step 2: Convert to fraction form
   22,963.16/31,686.98 = 12,889.29/x
3. Step 3: Cross multiply
   22,963.16x = 31,686.98 × 12,889.29
4. Step 4: Simplify right side
   22,963.16x = 408,422,689.22
5. Step 5: Solve for x
   x = 408,422,689.22/22,963.16
6. Step 6: Final answer
   x = 17,785.99