Finding the Third Proportional to 1,389,009 and 2,816,628

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,009 : 2,816,628 = 2,816,628 : x
2. Step 2: Convert to fraction form
   1,389,009/2,816,628 = 2,816,628/x
3. Step 3: Cross multiply
   1,389,009x = 2,816,628 × 2,816,628
4. Step 4: Simplify right side
   1,389,009x = 7,933,393,290,384
5. Step 5: Solve for x
   x = 7,933,393,290,384/1,389,009
6. Step 6: Final answer
   x = 5,711,549.23