Finding the Third Proportional to 1,345,185 and 1,998,621

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345,185 : 1,998,621 = 1,998,621 : x
2. Step 2: Convert to fraction form
   1,345,185/1,998,621 = 1,998,621/x
3. Step 3: Cross multiply
   1,345,185x = 1,998,621 × 1,998,621
4. Step 4: Simplify right side
   1,345,185x = 3,994,485,901,641
5. Step 5: Solve for x
   x = 3,994,485,901,641/1,345,185
6. Step 6: Final answer
   x = 2,969,469.55