Finding the Fourth Proportional to 1,127.89, 1,556.01 and 685.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.89 : 1,556.01 = 685.76 : x
2. Step 2: Convert to fraction form
   1,127.89/1,556.01 = 685.76/x
3. Step 3: Cross multiply
   1,127.89x = 1,556.01 × 685.76
4. Step 4: Simplify right side
   1,127.89x = 1,067,049.42
5. Step 5: Solve for x
   x = 1,067,049.42/1,127.89
6. Step 6: Final answer
   x = 946.06