Finding the Fourth Proportional to 1,182.20, 1,631.83 and 685.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.20 : 1,631.83 = 685.34 : x
2. Step 2: Convert to fraction form
   1,182.20/1,631.83 = 685.34/x
3. Step 3: Cross multiply
   1,182.20x = 1,631.83 × 685.34
4. Step 4: Simplify right side
   1,182.20x = 1,118,358.37
5. Step 5: Solve for x
   x = 1,118,358.37/1,182.20
6. Step 6: Final answer
   x = 946.00