Finding the Fourth Proportional to 16,487.78, 22,757.25 and 9,418.29

Step by Step Solution

1. Step 1: Write the proportion equation
   16,487.78 : 22,757.25 = 9,418.29 : x
2. Step 2: Convert to fraction form
   16,487.78/22,757.25 = 9,418.29/x
3. Step 3: Cross multiply
   16,487.78x = 22,757.25 × 9,418.29
4. Step 4: Simplify right side
   16,487.78x = 214,334,380.10
5. Step 5: Solve for x
   x = 214,334,380.10/16,487.78
6. Step 6: Final answer
   x = 12,999.59