Finding the Fourth Proportional to 16,239.33, 22,410.54 and 9,165.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,239.33 : 22,410.54 = 9,165.78 : x
2. Step 2: Convert to fraction form
   16,239.33/22,410.54 = 9,165.78/x
3. Step 3: Cross multiply
   16,239.33x = 22,410.54 × 9,165.78
4. Step 4: Simplify right side
   16,239.33x = 205,410,079.32
5. Step 5: Solve for x
   x = 205,410,079.32/16,239.33
6. Step 6: Final answer
   x = 12,648.93