Finding the Fourth Proportional to 2,863.40, 3,921.89 and 2,695.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,863.40 : 3,921.89 = 2,695.28 : x
2. Step 2: Convert to fraction form
   2,863.40/3,921.89 = 2,695.28/x
3. Step 3: Cross multiply
   2,863.40x = 3,921.89 × 2,695.28
4. Step 4: Simplify right side
   2,863.40x = 10,570,591.68
5. Step 5: Solve for x
   x = 10,570,591.68/2,863.40
6. Step 6: Final answer
   x = 3,691.62