Finding the Fourth Proportional to 22,787.98, 31,447.42 and 12,579.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,787.98 : 31,447.42 = 12,579.02 : x
2. Step 2: Convert to fraction form
   22,787.98/31,447.42 = 12,579.02/x
3. Step 3: Cross multiply
   22,787.98x = 31,447.42 × 12,579.02
4. Step 4: Simplify right side
   22,787.98x = 395,577,758.85
5. Step 5: Solve for x
   x = 395,577,758.85/22,787.98
6. Step 6: Final answer
   x = 17,359.05