Finding the Fourth Proportional to 2,057.31, 3,086.26 and 758.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.31 : 3,086.26 = 758.69 : x
2. Step 2: Convert to fraction form
   2,057.31/3,086.26 = 758.69/x
3. Step 3: Cross multiply
   2,057.31x = 3,086.26 × 758.69
4. Step 4: Simplify right side
   2,057.31x = 2,341,497.27
5. Step 5: Solve for x
   x = 2,341,497.27/2,057.31
6. Step 6: Final answer
   x = 1,138.14