Finding the Third Proportional to 18.50 and 38.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18.50 : 38.50 = 38.50 : x
2. Step 2: Convert to fraction form
   18.50/38.50 = 38.50/x
3. Step 3: Cross multiply
   18.50x = 38.50 × 38.50
4. Step 4: Simplify right side
   18.50x = 1,482.25
5. Step 5: Solve for x
   x = 1,482.25/18.50
6. Step 6: Final answer
   x = 80.12