Finding the Third Proportional to 3,838,828 and 8,400,824

Step by Step Solution

1. Step 1: Write the proportion equation
   3,838,828 : 8,400,824 = 8,400,824 : x
2. Step 2: Convert to fraction form
   3,838,828/8,400,824 = 8,400,824/x
3. Step 3: Cross multiply
   3,838,828x = 8,400,824 × 8,400,824
4. Step 4: Simplify right side
   3,838,828x = 70,573,843,878,976
5. Step 5: Solve for x
   x = 70,573,843,878,976/3,838,828
6. Step 6: Final answer
   x = 18,384,216.19