Finding the Fourth Proportional to 2,839.88, 3,919.05 and 1,581.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.88 : 3,919.05 = 1,581.05 : x
2. Step 2: Convert to fraction form
   2,839.88/3,919.05 = 1,581.05/x
3. Step 3: Cross multiply
   2,839.88x = 3,919.05 × 1,581.05
4. Step 4: Simplify right side
   2,839.88x = 6,196,223.80
5. Step 5: Solve for x
   x = 6,196,223.80/2,839.88
6. Step 6: Final answer
   x = 2,181.86