Finding the Fourth Proportional to 3,896.80, 5,838.72 and 2,740.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,896.80 : 5,838.72 = 2,740.12 : x
2. Step 2: Convert to fraction form
   3,896.80/5,838.72 = 2,740.12/x
3. Step 3: Cross multiply
   3,896.80x = 5,838.72 × 2,740.12
4. Step 4: Simplify right side
   3,896.80x = 15,998,793.45
5. Step 5: Solve for x
   x = 15,998,793.45/3,896.80
6. Step 6: Final answer
   x = 4,105.62