Finding the Fourth Proportional to 1,222.27, 1,686.71 and 676.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.27 : 1,686.71 = 676.55 : x
2. Step 2: Convert to fraction form
   1,222.27/1,686.71 = 676.55/x
3. Step 3: Cross multiply
   1,222.27x = 1,686.71 × 676.55
4. Step 4: Simplify right side
   1,222.27x = 1,141,139.27
5. Step 5: Solve for x
   x = 1,141,139.27/1,222.27
6. Step 6: Final answer
   x = 933.62