Finding the Fourth Proportional to 1,204.80, 1,662.60 and 680.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.80 : 1,662.60 = 680.82 : x
2. Step 2: Convert to fraction form
   1,204.80/1,662.60 = 680.82/x
3. Step 3: Cross multiply
   1,204.80x = 1,662.60 × 680.82
4. Step 4: Simplify right side
   1,204.80x = 1,131,931.33
5. Step 5: Solve for x
   x = 1,131,931.33/1,204.80
6. Step 6: Final answer
   x = 939.52