Finding the Fourth Proportional to 2,057.31, 3,087.33 and 1,920.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.31 : 3,087.33 = 1,920.62 : x
2. Step 2: Convert to fraction form
   2,057.31/3,087.33 = 1,920.62/x
3. Step 3: Cross multiply
   2,057.31x = 3,087.33 × 1,920.62
4. Step 4: Simplify right side
   2,057.31x = 5,929,562.70
5. Step 5: Solve for x
   x = 5,929,562.70/2,057.31
6. Step 6: Final answer
   x = 2,882.20