Finding the Fourth Proportional to 498.67, 688.25 and 324.52

Step by Step Solution

1. Step 1: Write the proportion equation
   498.67 : 688.25 = 324.52 : x
2. Step 2: Convert to fraction form
   498.67/688.25 = 324.52/x
3. Step 3: Cross multiply
   498.67x = 688.25 × 324.52
4. Step 4: Simplify right side
   498.67x = 223,345.83
5. Step 5: Solve for x
   x = 223,345.83/498.67
6. Step 6: Final answer
   x = 447.89