Finding the Fourth Proportional to 1,182.52, 1,631.81 and 685.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.52 : 1,631.81 = 685.12 : x
2. Step 2: Convert to fraction form
   1,182.52/1,631.81 = 685.12/x
3. Step 3: Cross multiply
   1,182.52x = 1,631.81 × 685.12
4. Step 4: Simplify right side
   1,182.52x = 1,117,982.24
5. Step 5: Solve for x
   x = 1,117,982.24/1,182.52
6. Step 6: Final answer
   x = 945.42