Finding the Third Proportional to 1,209,288 and 2,639,628

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,288 : 2,639,628 = 2,639,628 : x
2. Step 2: Convert to fraction form
   1,209,288/2,639,628 = 2,639,628/x
3. Step 3: Cross multiply
   1,209,288x = 2,639,628 × 2,639,628
4. Step 4: Simplify right side
   1,209,288x = 6,967,635,978,384
5. Step 5: Solve for x
   x = 6,967,635,978,384/1,209,288
6. Step 6: Final answer
   x = 5,761,767.24