Finding the Fourth Proportional to 1,204.81, 1,662.61 and 680.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204.81 : 1,662.61 = 680.83 : x
2. Step 2: Convert to fraction form
   1,204.81/1,662.61 = 680.83/x
3. Step 3: Cross multiply
   1,204.81x = 1,662.61 × 680.83
4. Step 4: Simplify right side
   1,204.81x = 1,131,954.77
5. Step 5: Solve for x
   x = 1,131,954.77/1,204.81
6. Step 6: Final answer
   x = 939.53