Finding the Third Proportional to 19,797.75 and 39,919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,797.75 : 39,919.50 = 39,919.50 : x
2. Step 2: Convert to fraction form
   19,797.75/39,919.50 = 39,919.50/x
3. Step 3: Cross multiply
   19,797.75x = 39,919.50 × 39,919.50
4. Step 4: Simplify right side
   19,797.75x = 1,593,566,480.25
5. Step 5: Solve for x
   x = 1,593,566,480.25/19,797.75
6. Step 6: Final answer
   x = 80,492.30