Finding the Fourth Proportional to 16,659.48, 22,989.88 and 9,105.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,659.48 : 22,989.88 = 9,105.80 : x
2. Step 2: Convert to fraction form
   16,659.48/22,989.88 = 9,105.80/x
3. Step 3: Cross multiply
   16,659.48x = 22,989.88 × 9,105.80
4. Step 4: Simplify right side
   16,659.48x = 209,341,249.30
5. Step 5: Solve for x
   x = 209,341,249.30/16,659.48
6. Step 6: Final answer
   x = 12,565.89