Finding the Fourth Proportional to 12,416.10, 18,613.68 and 5,390.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,416.10 : 18,613.68 = 5,390.82 : x
2. Step 2: Convert to fraction form
   12,416.10/18,613.68 = 5,390.82/x
3. Step 3: Cross multiply
   12,416.10x = 18,613.68 × 5,390.82
4. Step 4: Simplify right side
   12,416.10x = 100,342,998.42
5. Step 5: Solve for x
   x = 100,342,998.42/12,416.10
6. Step 6: Final answer
   x = 8,081.68