Finding the Fourth Proportional to 16,722.21, 23,076.18 and 9,168.15

Step by Step Solution

1. Step 1: Write the proportion equation
   16,722.21 : 23,076.18 = 9,168.15 : x
2. Step 2: Convert to fraction form
   16,722.21/23,076.18 = 9,168.15/x
3. Step 3: Cross multiply
   16,722.21x = 23,076.18 × 9,168.15
4. Step 4: Simplify right side
   16,722.21x = 211,565,879.67
5. Step 5: Solve for x
   x = 211,565,879.67/16,722.21
6. Step 6: Final answer
   x = 12,651.79