Finding the Fourth Proportional to 40,404.62, 60,613.34 and 12,318.24

Step by Step Solution

1. Step 1: Write the proportion equation
   40,404.62 : 60,613.34 = 12,318.24 : x
2. Step 2: Convert to fraction form
   40,404.62/60,613.34 = 12,318.24/x
3. Step 3: Cross multiply
   40,404.62x = 60,613.34 × 12,318.24
4. Step 4: Simplify right side
   40,404.62x = 746,649,607.73
5. Step 5: Solve for x
   x = 746,649,607.73/40,404.62
6. Step 6: Final answer
   x = 18,479.31