Finding the Fourth Proportional to 1,183.13, 1,632.72 and 685.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,183.13 : 1,632.72 = 685.87 : x
2. Step 2: Convert to fraction form
   1,183.13/1,632.72 = 685.87/x
3. Step 3: Cross multiply
   1,183.13x = 1,632.72 × 685.87
4. Step 4: Simplify right side
   1,183.13x = 1,119,833.67
5. Step 5: Solve for x
   x = 1,119,833.67/1,183.13
6. Step 6: Final answer
   x = 946.50