Finding the Third Proportional to 72.42 and 154.45

Step by Step Solution

1. Step 1: Write the proportion equation
   72.42 : 154.45 = 154.45 : x
2. Step 2: Convert to fraction form
   72.42/154.45 = 154.45/x
3. Step 3: Cross multiply
   72.42x = 154.45 × 154.45
4. Step 4: Simplify right side
   72.42x = 23,853.51
5. Step 5: Solve for x
   x = 23,853.51/72.42
6. Step 6: Final answer
   x = 329.39