Finding the Fourth Proportional to 1,104.85, 1,525.40 and 685.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.85 : 1,525.40 = 685.82 : x
2. Step 2: Convert to fraction form
   1,104.85/1,525.40 = 685.82/x
3. Step 3: Cross multiply
   1,104.85x = 1,525.40 × 685.82
4. Step 4: Simplify right side
   1,104.85x = 1,046,144.20
5. Step 5: Solve for x
   x = 1,046,144.20/1,104.85
6. Step 6: Final answer
   x = 946.87