Finding the Third Proportional to 1,999,171 and 4,387,412

Step by Step Solution

1. Step 1: Write the proportion equation
   1,999,171 : 4,387,412 = 4,387,412 : x
2. Step 2: Convert to fraction form
   1,999,171/4,387,412 = 4,387,412/x
3. Step 3: Cross multiply
   1,999,171x = 4,387,412 × 4,387,412
4. Step 4: Simplify right side
   1,999,171x = 19,249,384,057,744
5. Step 5: Solve for x
   x = 19,249,384,057,744/1,999,171
6. Step 6: Final answer
   x = 9,628,683.12