Finding the Third Proportional to 12.50 and 20.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12.50 : 20.88 = 20.88 : x
2. Step 2: Convert to fraction form
   12.50/20.88 = 20.88/x
3. Step 3: Cross multiply
   12.50x = 20.88 × 20.88
4. Step 4: Simplify right side
   12.50x = 435.77
5. Step 5: Solve for x
   x = 435.77/12.50
6. Step 6: Final answer
   x = 34.86