Finding the Fourth Proportional to 12,305.39, 18,456.27 and 3,986.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,305.39 : 18,456.27 = 3,986.14 : x
2. Step 2: Convert to fraction form
   12,305.39/18,456.27 = 3,986.14/x
3. Step 3: Cross multiply
   12,305.39x = 18,456.27 × 3,986.14
4. Step 4: Simplify right side
   12,305.39x = 73,569,276.10
5. Step 5: Solve for x
   x = 73,569,276.10/12,305.39
6. Step 6: Final answer
   x = 5,978.62