Finding the Fourth Proportional to 1,182.74, 1,632.22 and 685.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.74 : 1,632.22 = 685.43 : x
2. Step 2: Convert to fraction form
   1,182.74/1,632.22 = 685.43/x
3. Step 3: Cross multiply
   1,182.74x = 1,632.22 × 685.43
4. Step 4: Simplify right side
   1,182.74x = 1,118,768.80
5. Step 5: Solve for x
   x = 1,118,768.80/1,182.74
6. Step 6: Final answer
   x = 945.92