Finding the Fourth Proportional to 16,311.78, 22,498.16 and 10,640.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,311.78 : 22,498.16 = 10,640.16 : x
2. Step 2: Convert to fraction form
   16,311.78/22,498.16 = 10,640.16/x
3. Step 3: Cross multiply
   16,311.78x = 22,498.16 × 10,640.16
4. Step 4: Simplify right side
   16,311.78x = 239,383,968.90
5. Step 5: Solve for x
   x = 239,383,968.90/16,311.78
6. Step 6: Final answer
   x = 14,675.53