Finding the Third Proportional to 12.50 and 20.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12.50 : 20.56 = 20.56 : x
2. Step 2: Convert to fraction form
   12.50/20.56 = 20.56/x
3. Step 3: Cross multiply
   12.50x = 20.56 × 20.56
4. Step 4: Simplify right side
   12.50x = 422.82
5. Step 5: Solve for x
   x = 422.82/12.50
6. Step 6: Final answer
   x = 33.83