Finding the Third Proportional to 12.50 and 18.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12.50 : 18.88 = 18.88 : x
2. Step 2: Convert to fraction form
   12.50/18.88 = 18.88/x
3. Step 3: Cross multiply
   12.50x = 18.88 × 18.88
4. Step 4: Simplify right side
   12.50x = 356.27
5. Step 5: Solve for x
   x = 356.27/12.50
6. Step 6: Final answer
   x = 28.50