Finding the Third Proportional to 18,864.98 and 39,279.09

Step by Step Solution

1. Step 1: Write the proportion equation
   18,864.98 : 39,279.09 = 39,279.09 : x
2. Step 2: Convert to fraction form
   18,864.98/39,279.09 = 39,279.09/x
3. Step 3: Cross multiply
   18,864.98x = 39,279.09 × 39,279.09
4. Step 4: Simplify right side
   18,864.98x = 1,542,847,205.82
5. Step 5: Solve for x
   x = 1,542,847,205.82/18,864.98
6. Step 6: Final answer
   x = 81,783.65