Finding the Fourth Proportional to 16,215.54, 22,377.72 and 9,142.08

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.54 : 22,377.72 = 9,142.08 : x
2. Step 2: Convert to fraction form
   16,215.54/22,377.72 = 9,142.08/x
3. Step 3: Cross multiply
   16,215.54x = 22,377.72 × 9,142.08
4. Step 4: Simplify right side
   16,215.54x = 204,578,906.46
5. Step 5: Solve for x
   x = 204,578,906.46/16,215.54
6. Step 6: Final answer
   x = 12,616.23