Finding the Fourth Proportional to 16,421.76, 22,662.72 and 8,970.24

Step by Step Solution

1. Step 1: Write the proportion equation
   16,421.76 : 22,662.72 = 8,970.24 : x
2. Step 2: Convert to fraction form
   16,421.76/22,662.72 = 8,970.24/x
3. Step 3: Cross multiply
   16,421.76x = 22,662.72 × 8,970.24
4. Step 4: Simplify right side
   16,421.76x = 203,290,037.45
5. Step 5: Solve for x
   x = 203,290,037.45/16,421.76
6. Step 6: Final answer
   x = 12,379.31