Finding the Fourth Proportional to 1,182.88, 1,632.25 and 685.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.88 : 1,632.25 = 685.68 : x
2. Step 2: Convert to fraction form
   1,182.88/1,632.25 = 685.68/x
3. Step 3: Cross multiply
   1,182.88x = 1,632.25 × 685.68
4. Step 4: Simplify right side
   1,182.88x = 1,119,199.47
5. Step 5: Solve for x
   x = 1,119,199.47/1,182.88
6. Step 6: Final answer
   x = 946.17