Finding the Fourth Proportional to 2,590.30, 3,882.21 and 2,040.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.30 : 3,882.21 = 2,040.31 : x
2. Step 2: Convert to fraction form
   2,590.30/3,882.21 = 2,040.31/x
3. Step 3: Cross multiply
   2,590.30x = 3,882.21 × 2,040.31
4. Step 4: Simplify right side
   2,590.30x = 7,920,911.89
5. Step 5: Solve for x
   x = 7,920,911.89/2,590.30
6. Step 6: Final answer
   x = 3,057.91