Finding the Third Proportional to 3,990,377 and 8,264,524

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,377 : 8,264,524 = 8,264,524 : x
2. Step 2: Convert to fraction form
   3,990,377/8,264,524 = 8,264,524/x
3. Step 3: Cross multiply
   3,990,377x = 8,264,524 × 8,264,524
4. Step 4: Simplify right side
   3,990,377x = 68,302,356,946,576
5. Step 5: Solve for x
   x = 68,302,356,946,576/3,990,377
6. Step 6: Final answer
   x = 17,116,767.90