Finding the Fourth Proportional to 498.52, 688.04 and 302.05

Step by Step Solution

1. Step 1: Write the proportion equation
   498.52 : 688.04 = 302.05 : x
2. Step 2: Convert to fraction form
   498.52/688.04 = 302.05/x
3. Step 3: Cross multiply
   498.52x = 688.04 × 302.05
4. Step 4: Simplify right side
   498.52x = 207,822.48
5. Step 5: Solve for x
   x = 207,822.48/498.52
6. Step 6: Final answer
   x = 416.88