Finding the Third Proportional to 578,992 and 1,275,780

Step by Step Solution

1. Step 1: Write the proportion equation
   578,992 : 1,275,780 = 1,275,780 : x
2. Step 2: Convert to fraction form
   578,992/1,275,780 = 1,275,780/x
3. Step 3: Cross multiply
   578,992x = 1,275,780 × 1,275,780
4. Step 4: Simplify right side
   578,992x = 1,627,614,608,400
5. Step 5: Solve for x
   x = 1,627,614,608,400/578,992
6. Step 6: Final answer
   x = 2,811,117.61