Finding the Fourth Proportional to 3,890.20, 5,833.15 and 2,659

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.20 : 5,833.15 = 2,659 : x
2. Step 2: Convert to fraction form
   3,890.20/5,833.15 = 2,659/x
3. Step 3: Cross multiply
   3,890.20x = 5,833.15 × 2,659
4. Step 4: Simplify right side
   3,890.20x = 15,510,345.85
5. Step 5: Solve for x
   x = 15,510,345.85/3,890.20
6. Step 6: Final answer
   x = 3,987.03