Finding the Fourth Proportional to 3,919.43, 5,878.86 and 1,839.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.43 : 5,878.86 = 1,839.91 : x
2. Step 2: Convert to fraction form
   3,919.43/5,878.86 = 1,839.91/x
3. Step 3: Cross multiply
   3,919.43x = 5,878.86 × 1,839.91
4. Step 4: Simplify right side
   3,919.43x = 10,816,573.30
5. Step 5: Solve for x
   x = 10,816,573.30/3,919.43
6. Step 6: Final answer
   x = 2,759.73