Finding the Fourth Proportional to 16,239.50, 22,410.57 and 8,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,239.50 : 22,410.57 = 8,787.50 : x
2. Step 2: Convert to fraction form
   16,239.50/22,410.57 = 8,787.50/x
3. Step 3: Cross multiply
   16,239.50x = 22,410.57 × 8,787.50
4. Step 4: Simplify right side
   16,239.50x = 196,932,883.88
5. Step 5: Solve for x
   x = 196,932,883.88/16,239.50
6. Step 6: Final answer
   x = 12,126.78