Finding the Fourth Proportional to 3,976.92, 5,485.86 and 3,231.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.92 : 5,485.86 = 3,231.72 : x
2. Step 2: Convert to fraction form
   3,976.92/5,485.86 = 3,231.72/x
3. Step 3: Cross multiply
   3,976.92x = 5,485.86 × 3,231.72
4. Step 4: Simplify right side
   3,976.92x = 17,728,763.48
5. Step 5: Solve for x
   x = 17,728,763.48/3,976.92
6. Step 6: Final answer
   x = 4,457.91