Finding the Third Proportional to 12.50 and 15.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12.50 : 15.38 = 15.38 : x
2. Step 2: Convert to fraction form
   12.50/15.38 = 15.38/x
3. Step 3: Cross multiply
   12.50x = 15.38 × 15.38
4. Step 4: Simplify right side
   12.50x = 236.39
5. Step 5: Solve for x
   x = 236.39/12.50
6. Step 6: Final answer
   x = 18.91