Finding the Fourth Proportional to 1,105.67, 1,525.83 and 685.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.67 : 1,525.83 = 685.93 : x
2. Step 2: Convert to fraction form
   1,105.67/1,525.83 = 685.93/x
3. Step 3: Cross multiply
   1,105.67x = 1,525.83 × 685.93
4. Step 4: Simplify right side
   1,105.67x = 1,046,612.57
5. Step 5: Solve for x
   x = 1,046,612.57/1,105.67
6. Step 6: Final answer
   x = 946.59