Finding the Fourth Proportional to 498.01, 687.36 and 323.05

Step by Step Solution

1. Step 1: Write the proportion equation
   498.01 : 687.36 = 323.05 : x
2. Step 2: Convert to fraction form
   498.01/687.36 = 323.05/x
3. Step 3: Cross multiply
   498.01x = 687.36 × 323.05
4. Step 4: Simplify right side
   498.01x = 222,051.14
5. Step 5: Solve for x
   x = 222,051.14/498.01
6. Step 6: Final answer
   x = 445.88