Finding the Fourth Proportional to 1,119.89, 1,545.56 and 677.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119.89 : 1,545.56 = 677.78 : x
2. Step 2: Convert to fraction form
   1,119.89/1,545.56 = 677.78/x
3. Step 3: Cross multiply
   1,119.89x = 1,545.56 × 677.78
4. Step 4: Simplify right side
   1,119.89x = 1,047,538.54
5. Step 5: Solve for x
   x = 1,047,538.54/1,119.89
6. Step 6: Final answer
   x = 935.40