Finding the Fourth Proportional to 22,787.98, 31,443.64 and 15,222.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,787.98 : 31,443.64 = 15,222.18 : x
2. Step 2: Convert to fraction form
   22,787.98/31,443.64 = 15,222.18/x
3. Step 3: Cross multiply
   22,787.98x = 31,443.64 × 15,222.18
4. Step 4: Simplify right side
   22,787.98x = 478,640,747.94
5. Step 5: Solve for x
   x = 478,640,747.94/22,787.98
6. Step 6: Final answer
   x = 21,004.09