Finding the Third Proportional to 147.38 and 317.38

Step by Step Solution

1. Step 1: Write the proportion equation
   147.38 : 317.38 = 317.38 : x
2. Step 2: Convert to fraction form
   147.38/317.38 = 317.38/x
3. Step 3: Cross multiply
   147.38x = 317.38 × 317.38
4. Step 4: Simplify right side
   147.38x = 100,726.89
5. Step 5: Solve for x
   x = 100,726.89/147.38
6. Step 6: Final answer
   x = 683.47