Finding the Third Proportional to 19,980 and 40,520.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,980 : 40,520.25 = 40,520.25 : x
2. Step 2: Convert to fraction form
   19,980/40,520.25 = 40,520.25/x
3. Step 3: Cross multiply
   19,980x = 40,520.25 × 40,520.25
4. Step 4: Simplify right side
   19,980x = 1,641,890,660.06
5. Step 5: Solve for x
   x = 1,641,890,660.06/19,980
6. Step 6: Final answer
   x = 82,176.71