Finding the Third Proportional to 20.72 and 45.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20.72 : 45.25 = 45.25 : x
2. Step 2: Convert to fraction form
   20.72/45.25 = 45.25/x
3. Step 3: Cross multiply
   20.72x = 45.25 × 45.25
4. Step 4: Simplify right side
   20.72x = 2,047.21
5. Step 5: Solve for x
   x = 2,047.21/20.72
6. Step 6: Final answer
   x = 98.78