Finding the Fourth Proportional to 498.24, 687.59 and 350.91

Step by Step Solution

1. Step 1: Write the proportion equation
   498.24 : 687.59 = 350.91 : x
2. Step 2: Convert to fraction form
   498.24/687.59 = 350.91/x
3. Step 3: Cross multiply
   498.24x = 687.59 × 350.91
4. Step 4: Simplify right side
   498.24x = 241,280.45
5. Step 5: Solve for x
   x = 241,280.45/498.24
6. Step 6: Final answer
   x = 484.27