Finding the Third Proportional to 19,449.50 and 39,612.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,449.50 : 39,612.50 = 39,612.50 : x
2. Step 2: Convert to fraction form
   19,449.50/39,612.50 = 39,612.50/x
3. Step 3: Cross multiply
   19,449.50x = 39,612.50 × 39,612.50
4. Step 4: Simplify right side
   19,449.50x = 1,569,150,156.25
5. Step 5: Solve for x
   x = 1,569,150,156.25/19,449.50
6. Step 6: Final answer
   x = 80,678.17