Finding the Fourth Proportional to 1,105.29, 1,524.69 and 685.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.29 : 1,524.69 = 685.26 : x
2. Step 2: Convert to fraction form
   1,105.29/1,524.69 = 685.26/x
3. Step 3: Cross multiply
   1,105.29x = 1,524.69 × 685.26
4. Step 4: Simplify right side
   1,105.29x = 1,044,809.07
5. Step 5: Solve for x
   x = 1,044,809.07/1,105.29
6. Step 6: Final answer
   x = 945.28