Finding the Fourth Proportional to 16,105.86, 22,202.78 and 11,311.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,105.86 : 22,202.78 = 11,311.20 : x
2. Step 2: Convert to fraction form
   16,105.86/22,202.78 = 11,311.20/x
3. Step 3: Cross multiply
   16,105.86x = 22,202.78 × 11,311.20
4. Step 4: Simplify right side
   16,105.86x = 251,140,028.58
5. Step 5: Solve for x
   x = 251,140,028.58/16,105.86
6. Step 6: Final answer
   x = 15,593.08