Finding the Third Proportional to 8,172,638 and 17,939,360

Step by Step Solution

1. Step 1: Write the proportion equation
   8,172,638 : 17,939,360 = 17,939,360 : x
2. Step 2: Convert to fraction form
   8,172,638/17,939,360 = 17,939,360/x
3. Step 3: Cross multiply
   8,172,638x = 17,939,360 × 17,939,360
4. Step 4: Simplify right side
   8,172,638x = 321,820,637,209,600
5. Step 5: Solve for x
   x = 321,820,637,209,600/8,172,638
6. Step 6: Final answer
   x = 39,377,816.22