Finding the Fourth Proportional to 1,127.94, 1,556.46 and 685.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.94 : 1,556.46 = 685.98 : x
2. Step 2: Convert to fraction form
   1,127.94/1,556.46 = 685.98/x
3. Step 3: Cross multiply
   1,127.94x = 1,556.46 × 685.98
4. Step 4: Simplify right side
   1,127.94x = 1,067,700.43
5. Step 5: Solve for x
   x = 1,067,700.43/1,127.94
6. Step 6: Final answer
   x = 946.59