Finding the Third Proportional to 3,920,168 and 8,440,924

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920,168 : 8,440,924 = 8,440,924 : x
2. Step 2: Convert to fraction form
   3,920,168/8,440,924 = 8,440,924/x
3. Step 3: Cross multiply
   3,920,168x = 8,440,924 × 8,440,924
4. Step 4: Simplify right side
   3,920,168x = 71,249,197,973,776
5. Step 5: Solve for x
   x = 71,249,197,973,776/3,920,168
6. Step 6: Final answer
   x = 18,175,036.88