Finding the Fourth Proportional to 1,204.56, 1,662.32 and 680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.56 : 1,662.32 = 680.72 : x
2. Step 2: Convert to fraction form
   1,204.56/1,662.32 = 680.72/x
3. Step 3: Cross multiply
   1,204.56x = 1,662.32 × 680.72
4. Step 4: Simplify right side
   1,204.56x = 1,131,574.47
5. Step 5: Solve for x
   x = 1,131,574.47/1,204.56
6. Step 6: Final answer
   x = 939.41