Finding the Fourth Proportional to 1,085.69, 1,629.04 and 531.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.69 : 1,629.04 = 531.08 : x
2. Step 2: Convert to fraction form
   1,085.69/1,629.04 = 531.08/x
3. Step 3: Cross multiply
   1,085.69x = 1,629.04 × 531.08
4. Step 4: Simplify right side
   1,085.69x = 865,142.42
5. Step 5: Solve for x
   x = 865,142.42/1,085.69
6. Step 6: Final answer
   x = 796.86