Finding the Third Proportional to 355.38 and 498.13

Step by Step Solution

1. Step 1: Write the proportion equation
   355.38 : 498.13 = 498.13 : x
2. Step 2: Convert to fraction form
   355.38/498.13 = 498.13/x
3. Step 3: Cross multiply
   355.38x = 498.13 × 498.13
4. Step 4: Simplify right side
   355.38x = 248,128.52
5. Step 5: Solve for x
   x = 248,128.52/355.38
6. Step 6: Final answer
   x = 698.22