Finding the Fourth Proportional to 8,787.98, 12,127.67 and 4,809.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,787.98 : 12,127.67 = 4,809.31 : x
2. Step 2: Convert to fraction form
   8,787.98/12,127.67 = 4,809.31/x
3. Step 3: Cross multiply
   8,787.98x = 12,127.67 × 4,809.31
4. Step 4: Simplify right side
   8,787.98x = 58,325,724.61
5. Step 5: Solve for x
   x = 58,325,724.61/8,787.98
6. Step 6: Final answer
   x = 6,636.99