Finding the Fourth Proportional to 2,801.20, 3,863.94 and 2,016.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.20 : 3,863.94 = 2,016.31 : x
2. Step 2: Convert to fraction form
   2,801.20/3,863.94 = 2,016.31/x
3. Step 3: Cross multiply
   2,801.20x = 3,863.94 × 2,016.31
4. Step 4: Simplify right side
   2,801.20x = 7,790,900.86
5. Step 5: Solve for x
   x = 7,790,900.86/2,801.20
6. Step 6: Final answer
   x = 2,781.27