Finding the Third Proportional to 147.02 and 318.52

Step by Step Solution

1. Step 1: Write the proportion equation
   147.02 : 318.52 = 318.52 : x
2. Step 2: Convert to fraction form
   147.02/318.52 = 318.52/x
3. Step 3: Cross multiply
   147.02x = 318.52 × 318.52
4. Step 4: Simplify right side
   147.02x = 101,452.20
5. Step 5: Solve for x
   x = 101,452.20/147.02
6. Step 6: Final answer
   x = 690.04