Finding the Fourth Proportional to 22,826.16, 31,490.72 and 13,872.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,826.16 : 31,490.72 = 13,872.22 : x
2. Step 2: Convert to fraction form
   22,826.16/31,490.72 = 13,872.22/x
3. Step 3: Cross multiply
   22,826.16x = 31,490.72 × 13,872.22
4. Step 4: Simplify right side
   22,826.16x = 436,846,195.80
5. Step 5: Solve for x
   x = 436,846,195.80/22,826.16
6. Step 6: Final answer
   x = 19,137.96