Finding the Fourth Proportional to 16,217.82, 22,315.60 and 12,439.47

Step by Step Solution

1. Step 1: Write the proportion equation
   16,217.82 : 22,315.60 = 12,439.47 : x
2. Step 2: Convert to fraction form
   16,217.82/22,315.60 = 12,439.47/x
3. Step 3: Cross multiply
   16,217.82x = 22,315.60 × 12,439.47
4. Step 4: Simplify right side
   16,217.82x = 277,594,335.96
5. Step 5: Solve for x
   x = 277,594,335.96/16,217.82
6. Step 6: Final answer
   x = 17,116.62