Finding the Fourth Proportional to 2,957.28, 4,435.55 and 765.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,957.28 : 4,435.55 = 765.82 : x
2. Step 2: Convert to fraction form
   2,957.28/4,435.55 = 765.82/x
3. Step 3: Cross multiply
   2,957.28x = 4,435.55 × 765.82
4. Step 4: Simplify right side
   2,957.28x = 3,396,832.90
5. Step 5: Solve for x
   x = 3,396,832.90/2,957.28
6. Step 6: Final answer
   x = 1,148.63