Finding the Fourth Proportional to 2,328.72, 3,493.77 and 685.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.72 : 3,493.77 = 685.32 : x
2. Step 2: Convert to fraction form
   2,328.72/3,493.77 = 685.32/x
3. Step 3: Cross multiply
   2,328.72x = 3,493.77 × 685.32
4. Step 4: Simplify right side
   2,328.72x = 2,394,350.46
5. Step 5: Solve for x
   x = 2,394,350.46/2,328.72
6. Step 6: Final answer
   x = 1,028.18