Finding the Fourth Proportional to 2,855.32, 3,938.96 and 2,016.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,855.32 : 3,938.96 = 2,016.16 : x
2. Step 2: Convert to fraction form
   2,855.32/3,938.96 = 2,016.16/x
3. Step 3: Cross multiply
   2,855.32x = 3,938.96 × 2,016.16
4. Step 4: Simplify right side
   2,855.32x = 7,941,573.59
5. Step 5: Solve for x
   x = 7,941,573.59/2,855.32
6. Step 6: Final answer
   x = 2,781.33