Finding the Fourth Proportional to 16,215.73, 22,377.67 and 9,142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.73 : 22,377.67 = 9,142.10 : x
2. Step 2: Convert to fraction form
   16,215.73/22,377.67 = 9,142.10/x
3. Step 3: Cross multiply
   16,215.73x = 22,377.67 × 9,142.10
4. Step 4: Simplify right side
   16,215.73x = 204,578,846.08
5. Step 5: Solve for x
   x = 204,578,846.08/16,215.73
6. Step 6: Final answer
   x = 12,616.08