Finding the Fourth Proportional to 16,443.20, 22,691.60 and 8,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,443.20 : 22,691.60 = 8,889.50 : x
2. Step 2: Convert to fraction form
   16,443.20/22,691.60 = 8,889.50/x
3. Step 3: Cross multiply
   16,443.20x = 22,691.60 × 8,889.50
4. Step 4: Simplify right side
   16,443.20x = 201,716,978.20
5. Step 5: Solve for x
   x = 201,716,978.20/16,443.20
6. Step 6: Final answer
   x = 12,267.50