Finding the Fourth Proportional to 12,086.28, 18,118.49 and 4,293.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.28 : 18,118.49 = 4,293.27 : x
2. Step 2: Convert to fraction form
   12,086.28/18,118.49 = 4,293.27/x
3. Step 3: Cross multiply
   12,086.28x = 18,118.49 × 4,293.27
4. Step 4: Simplify right side
   12,086.28x = 77,787,548.10
5. Step 5: Solve for x
   x = 77,787,548.10/12,086.28
6. Step 6: Final answer
   x = 6,436.02