Finding the Fourth Proportional to 12,378.29, 18,568.71 and 3,613.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,378.29 : 18,568.71 = 3,613.14 : x
2. Step 2: Convert to fraction form
   12,378.29/18,568.71 = 3,613.14/x
3. Step 3: Cross multiply
   12,378.29x = 18,568.71 × 3,613.14
4. Step 4: Simplify right side
   12,378.29x = 67,091,348.85
5. Step 5: Solve for x
   x = 67,091,348.85/12,378.29
6. Step 6: Final answer
   x = 5,420.08