Finding the Fourth Proportional to 8,105.12, 12,160.56 and 3,946.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.12 : 12,160.56 = 3,946.40 : x
2. Step 2: Convert to fraction form
   8,105.12/12,160.56 = 3,946.40/x
3. Step 3: Cross multiply
   8,105.12x = 12,160.56 × 3,946.40
4. Step 4: Simplify right side
   8,105.12x = 47,990,433.98
5. Step 5: Solve for x
   x = 47,990,433.98/8,105.12
6. Step 6: Final answer
   x = 5,921.00