Finding the Third Proportional to 578,998 and 1,275,790

Step by Step Solution

1. Step 1: Write the proportion equation
   578,998 : 1,275,790 = 1,275,790 : x
2. Step 2: Convert to fraction form
   578,998/1,275,790 = 1,275,790/x
3. Step 3: Cross multiply
   578,998x = 1,275,790 × 1,275,790
4. Step 4: Simplify right side
   578,998x = 1,627,640,124,100
5. Step 5: Solve for x
   x = 1,627,640,124,100/578,998
6. Step 6: Final answer
   x = 2,811,132.55