Finding the Third Proportional to 71.30 and 155.39

Step by Step Solution

1. Step 1: Write the proportion equation
   71.30 : 155.39 = 155.39 : x
2. Step 2: Convert to fraction form
   71.30/155.39 = 155.39/x
3. Step 3: Cross multiply
   71.30x = 155.39 × 155.39
4. Step 4: Simplify right side
   71.30x = 24,146.25
5. Step 5: Solve for x
   x = 24,146.25/71.30
6. Step 6: Final answer
   x = 338.67