Finding the Third Proportional to 19,778.25 and 40,290.88

Step by Step Solution

1. Step 1: Write the proportion equation
   19,778.25 : 40,290.88 = 40,290.88 : x
2. Step 2: Convert to fraction form
   19,778.25/40,290.88 = 40,290.88/x
3. Step 3: Cross multiply
   19,778.25x = 40,290.88 × 40,290.88
4. Step 4: Simplify right side
   19,778.25x = 1,623,354,608.27
5. Step 5: Solve for x
   x = 1,623,354,608.27/19,778.25
6. Step 6: Final answer
   x = 82,077.77