Finding the Fourth Proportional to 12,009.60, 16,562.88 and 9,650.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.60 : 16,562.88 = 9,650.88 : x
2. Step 2: Convert to fraction form
   12,009.60/16,562.88 = 9,650.88/x
3. Step 3: Cross multiply
   12,009.60x = 16,562.88 × 9,650.88
4. Step 4: Simplify right side
   12,009.60x = 159,846,367.33
5. Step 5: Solve for x
   x = 159,846,367.33/12,009.60
6. Step 6: Final answer
   x = 13,309.88