Finding the Third Proportional to 8,172,640 and 17,939,364

Step by Step Solution

1. Step 1: Write the proportion equation
   8,172,640 : 17,939,364 = 17,939,364 : x
2. Step 2: Convert to fraction form
   8,172,640/17,939,364 = 17,939,364/x
3. Step 3: Cross multiply
   8,172,640x = 17,939,364 × 17,939,364
4. Step 4: Simplify right side
   8,172,640x = 321,820,780,724,496
5. Step 5: Solve for x
   x = 321,820,780,724,496/8,172,640
6. Step 6: Final answer
   x = 39,377,824.15