Finding the Fourth Proportional to 22,787.98, 31,447.71 and 13,230.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,787.98 : 31,447.71 = 13,230.10 : x
2. Step 2: Convert to fraction form
   22,787.98/31,447.71 = 13,230.10/x
3. Step 3: Cross multiply
   22,787.98x = 31,447.71 × 13,230.10
4. Step 4: Simplify right side
   22,787.98x = 416,056,348.07
5. Step 5: Solve for x
   x = 416,056,348.07/22,787.98
6. Step 6: Final answer
   x = 18,257.71