Finding the Third Proportional to 1,621,838 and 3,567,420

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621,838 : 3,567,420 = 3,567,420 : x
2. Step 2: Convert to fraction form
   1,621,838/3,567,420 = 3,567,420/x
3. Step 3: Cross multiply
   1,621,838x = 3,567,420 × 3,567,420
4. Step 4: Simplify right side
   1,621,838x = 12,726,485,456,400
5. Step 5: Solve for x
   x = 12,726,485,456,400/1,621,838
6. Step 6: Final answer
   x = 7,846,952.32