Finding the Third Proportional to 1,209,488 and 2,648,128

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,488 : 2,648,128 = 2,648,128 : x
2. Step 2: Convert to fraction form
   1,209,488/2,648,128 = 2,648,128/x
3. Step 3: Cross multiply
   1,209,488x = 2,648,128 × 2,648,128
4. Step 4: Simplify right side
   1,209,488x = 7,012,581,904,384
5. Step 5: Solve for x
   x = 7,012,581,904,384/1,209,488
6. Step 6: Final answer
   x = 5,797,975.59