Finding the Fourth Proportional to 12,194.64, 18,294.52 and 3,986

Step by Step Solution

1. Step 1: Write the proportion equation
   12,194.64 : 18,294.52 = 3,986 : x
2. Step 2: Convert to fraction form
   12,194.64/18,294.52 = 3,986/x
3. Step 3: Cross multiply
   12,194.64x = 18,294.52 × 3,986
4. Step 4: Simplify right side
   12,194.64x = 72,921,956.72
5. Step 5: Solve for x
   x = 72,921,956.72/12,194.64
6. Step 6: Final answer
   x = 5,979.84