Finding the Fourth Proportional to 3,959.76, 5,463.72 and 2,280.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,959.76 : 5,463.72 = 2,280.72 : x
2. Step 2: Convert to fraction form
   3,959.76/5,463.72 = 2,280.72/x
3. Step 3: Cross multiply
   3,959.76x = 5,463.72 × 2,280.72
4. Step 4: Simplify right side
   3,959.76x = 12,461,215.48
5. Step 5: Solve for x
   x = 12,461,215.48/3,959.76
6. Step 6: Final answer
   x = 3,146.96