Finding the Fourth Proportional to 2,630.35, 3,945.39 and 682.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.35 : 3,945.39 = 682.57 : x
2. Step 2: Convert to fraction form
   2,630.35/3,945.39 = 682.57/x
3. Step 3: Cross multiply
   2,630.35x = 3,945.39 × 682.57
4. Step 4: Simplify right side
   2,630.35x = 2,693,004.85
5. Step 5: Solve for x
   x = 2,693,004.85/2,630.35
6. Step 6: Final answer
   x = 1,023.82