Finding the Fourth Proportional to 1,211.33, 1,671.56 and 680.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,211.33 : 1,671.56 = 680.27 : x
2. Step 2: Convert to fraction form
   1,211.33/1,671.56 = 680.27/x
3. Step 3: Cross multiply
   1,211.33x = 1,671.56 × 680.27
4. Step 4: Simplify right side
   1,211.33x = 1,137,112.12
5. Step 5: Solve for x
   x = 1,137,112.12/1,211.33
6. Step 6: Final answer
   x = 938.73