Finding the Fourth Proportional to 16,085.60, 24,129.12 and 8,309.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,085.60 : 24,129.12 = 8,309.60 : x
2. Step 2: Convert to fraction form
   16,085.60/24,129.12 = 8,309.60/x
3. Step 3: Cross multiply
   16,085.60x = 24,129.12 × 8,309.60
4. Step 4: Simplify right side
   16,085.60x = 200,503,335.55
5. Step 5: Solve for x
   x = 200,503,335.55/16,085.60
6. Step 6: Final answer
   x = 12,464.77