Finding the Fourth Proportional to 498.83, 685.94 and 443.48

Step by Step Solution

1. Step 1: Write the proportion equation
   498.83 : 685.94 = 443.48 : x
2. Step 2: Convert to fraction form
   498.83/685.94 = 443.48/x
3. Step 3: Cross multiply
   498.83x = 685.94 × 443.48
4. Step 4: Simplify right side
   498.83x = 304,195.02
5. Step 5: Solve for x
   x = 304,195.02/498.83
6. Step 6: Final answer
   x = 609.82