Finding the Fourth Proportional to 1,127.97, 1,556.15 and 685.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.97 : 1,556.15 = 685.71 : x
2. Step 2: Convert to fraction form
   1,127.97/1,556.15 = 685.71/x
3. Step 3: Cross multiply
   1,127.97x = 1,556.15 × 685.71
4. Step 4: Simplify right side
   1,127.97x = 1,067,064.19
5. Step 5: Solve for x
   x = 1,067,064.19/1,127.97
6. Step 6: Final answer
   x = 946.00