Finding the Fourth Proportional to 12,386.98, 18,578.47 and 4,066.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,386.98 : 18,578.47 = 4,066.83 : x
2. Step 2: Convert to fraction form
   12,386.98/18,578.47 = 4,066.83/x
3. Step 3: Cross multiply
   12,386.98x = 18,578.47 × 4,066.83
4. Step 4: Simplify right side
   12,386.98x = 75,555,479.15
5. Step 5: Solve for x
   x = 75,555,479.15/12,386.98
6. Step 6: Final answer
   x = 6,099.59