Finding the Third Proportional to 1,939,658 and 4,215,057

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939,658 : 4,215,057 = 4,215,057 : x
2. Step 2: Convert to fraction form
   1,939,658/4,215,057 = 4,215,057/x
3. Step 3: Cross multiply
   1,939,658x = 4,215,057 × 4,215,057
4. Step 4: Simplify right side
   1,939,658x = 17,766,705,513,249
5. Step 5: Solve for x
   x = 17,766,705,513,249/1,939,658
6. Step 6: Final answer
   x = 9,159,710.38