Finding the Fourth Proportional to 1,204.56, 1,662.38 and 680.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.56 : 1,662.38 = 680.69 : x
2. Step 2: Convert to fraction form
   1,204.56/1,662.38 = 680.69/x
3. Step 3: Cross multiply
   1,204.56x = 1,662.38 × 680.69
4. Step 4: Simplify right side
   1,204.56x = 1,131,553.73
5. Step 5: Solve for x
   x = 1,131,553.73/1,204.56
6. Step 6: Final answer
   x = 939.39