Finding the Fourth Proportional to 2,891.39, 3,983.33 and 2,005.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.39 : 3,983.33 = 2,005.65 : x
2. Step 2: Convert to fraction form
   2,891.39/3,983.33 = 2,005.65/x
3. Step 3: Cross multiply
   2,891.39x = 3,983.33 × 2,005.65
4. Step 4: Simplify right side
   2,891.39x = 7,989,155.79
5. Step 5: Solve for x
   x = 7,989,155.79/2,891.39
6. Step 6: Final answer
   x = 2,763.09