Finding the Fourth Proportional to 498.83, 688.37 and 302.33

Step by Step Solution

1. Step 1: Write the proportion equation
   498.83 : 688.37 = 302.33 : x
2. Step 2: Convert to fraction form
   498.83/688.37 = 302.33/x
3. Step 3: Cross multiply
   498.83x = 688.37 × 302.33
4. Step 4: Simplify right side
   498.83x = 208,117.38
5. Step 5: Solve for x
   x = 208,117.38/498.83
6. Step 6: Final answer
   x = 417.22