Finding the Fourth Proportional to 2,245.55, 3,368.89 and 685.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,245.55 : 3,368.89 = 685.49 : x
2. Step 2: Convert to fraction form
   2,245.55/3,368.89 = 685.49/x
3. Step 3: Cross multiply
   2,245.55x = 3,368.89 × 685.49
4. Step 4: Simplify right side
   2,245.55x = 2,309,333.89
5. Step 5: Solve for x
   x = 2,309,333.89/2,245.55
6. Step 6: Final answer
   x = 1,028.41