Finding the Third Proportional to 101.72 and 156.15

Step by Step Solution

1. Step 1: Write the proportion equation
   101.72 : 156.15 = 156.15 : x
2. Step 2: Convert to fraction form
   101.72/156.15 = 156.15/x
3. Step 3: Cross multiply
   101.72x = 156.15 × 156.15
4. Step 4: Simplify right side
   101.72x = 24,381.72
5. Step 5: Solve for x
   x = 24,381.72/101.72
6. Step 6: Final answer
   x = 239.68