Finding the Third Proportional to 110.72 and 156.61

Step by Step Solution

1. Step 1: Write the proportion equation
   110.72 : 156.61 = 156.61 : x
2. Step 2: Convert to fraction form
   110.72/156.61 = 156.61/x
3. Step 3: Cross multiply
   110.72x = 156.61 × 156.61
4. Step 4: Simplify right side
   110.72x = 24,526.50
5. Step 5: Solve for x
   x = 24,526.50/110.72
6. Step 6: Final answer
   x = 221.52