Finding the Fourth Proportional to 2,328.53, 3,493.55 and 685.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.53 : 3,493.55 = 685.09 : x
2. Step 2: Convert to fraction form
   2,328.53/3,493.55 = 685.09/x
3. Step 3: Cross multiply
   2,328.53x = 3,493.55 × 685.09
4. Step 4: Simplify right side
   2,328.53x = 2,393,389.15
5. Step 5: Solve for x
   x = 2,393,389.15/2,328.53
6. Step 6: Final answer
   x = 1,027.85