Finding the Fourth Proportional to 16,291, 22,481.61 and 9,217.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,291 : 22,481.61 = 9,217.27 : x
2. Step 2: Convert to fraction form
   16,291/22,481.61 = 9,217.27/x
3. Step 3: Cross multiply
   16,291x = 22,481.61 × 9,217.27
4. Step 4: Simplify right side
   16,291x = 207,219,023.32
5. Step 5: Solve for x
   x = 207,219,023.32/16,291
6. Step 6: Final answer
   x = 12,719.85