Finding the Fourth Proportional to 2,057.36, 3,086.52 and 758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.36 : 3,086.52 = 758.72 : x
2. Step 2: Convert to fraction form
   2,057.36/3,086.52 = 758.72/x
3. Step 3: Cross multiply
   2,057.36x = 3,086.52 × 758.72
4. Step 4: Simplify right side
   2,057.36x = 2,341,804.45
5. Step 5: Solve for x
   x = 2,341,804.45/2,057.36
6. Step 6: Final answer
   x = 1,138.26