Finding the Fourth Proportional to 1,183.31, 1,632.83 and 686.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,183.31 : 1,632.83 = 686.10 : x
2. Step 2: Convert to fraction form
   1,183.31/1,632.83 = 686.10/x
3. Step 3: Cross multiply
   1,183.31x = 1,632.83 × 686.10
4. Step 4: Simplify right side
   1,183.31x = 1,120,281.23
5. Step 5: Solve for x
   x = 1,120,281.23/1,183.31
6. Step 6: Final answer
   x = 946.74