Finding the Third Proportional to 72.28 and 156.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72.28 : 156.09 = 156.09 : x
2. Step 2: Convert to fraction form
   72.28/156.09 = 156.09/x
3. Step 3: Cross multiply
   72.28x = 156.09 × 156.09
4. Step 4: Simplify right side
   72.28x = 24,365.26
5. Step 5: Solve for x
   x = 24,365.26/72.28
6. Step 6: Final answer
   x = 337.09