Finding the Fourth Proportional to 1,150.75, 1,588.22 and 685.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.75 : 1,588.22 = 685.27 : x
2. Step 2: Convert to fraction form
   1,150.75/1,588.22 = 685.27/x
3. Step 3: Cross multiply
   1,150.75x = 1,588.22 × 685.27
4. Step 4: Simplify right side
   1,150.75x = 1,088,356.09
5. Step 5: Solve for x
   x = 1,088,356.09/1,150.75
6. Step 6: Final answer
   x = 945.78