Finding the Fourth Proportional to 2,854.57, 3,939.83 and 1,659.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,854.57 : 3,939.83 = 1,659.72 : x
2. Step 2: Convert to fraction form
   2,854.57/3,939.83 = 1,659.72/x
3. Step 3: Cross multiply
   2,854.57x = 3,939.83 × 1,659.72
4. Step 4: Simplify right side
   2,854.57x = 6,539,014.65
5. Step 5: Solve for x
   x = 6,539,014.65/2,854.57
6. Step 6: Final answer
   x = 2,290.72