Finding the Third Proportional to 3,920,642 and 8,492,879

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920,642 : 8,492,879 = 8,492,879 : x
2. Step 2: Convert to fraction form
   3,920,642/8,492,879 = 8,492,879/x
3. Step 3: Cross multiply
   3,920,642x = 8,492,879 × 8,492,879
4. Step 4: Simplify right side
   3,920,642x = 72,128,993,708,641
5. Step 5: Solve for x
   x = 72,128,993,708,641/3,920,642
6. Step 6: Final answer
   x = 18,397,240.48