Finding the Fourth Proportional to 16,613.76, 24,963.72 and 12,492.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,613.76 : 24,963.72 = 12,492.60 : x
2. Step 2: Convert to fraction form
   16,613.76/24,963.72 = 12,492.60/x
3. Step 3: Cross multiply
   16,613.76x = 24,963.72 × 12,492.60
4. Step 4: Simplify right side
   16,613.76x = 311,861,768.47
5. Step 5: Solve for x
   x = 311,861,768.47/16,613.76
6. Step 6: Final answer
   x = 18,771.29