Finding the Fourth Proportional to 16,215.92, 22,377.67 and 9,142.35

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.92 : 22,377.67 = 9,142.35 : x
2. Step 2: Convert to fraction form
   16,215.92/22,377.67 = 9,142.35/x
3. Step 3: Cross multiply
   16,215.92x = 22,377.67 × 9,142.35
4. Step 4: Simplify right side
   16,215.92x = 204,584,491.32
5. Step 5: Solve for x
   x = 204,584,491.32/16,215.92
6. Step 6: Final answer
   x = 12,616.27