Finding the Third Proportional to 828,648 and 1,279,605

Step by Step Solution

1. Step 1: Write the proportion equation
   828,648 : 1,279,605 = 1,279,605 : x
2. Step 2: Convert to fraction form
   828,648/1,279,605 = 1,279,605/x
3. Step 3: Cross multiply
   828,648x = 1,279,605 × 1,279,605
4. Step 4: Simplify right side
   828,648x = 1,637,388,956,025
5. Step 5: Solve for x
   x = 1,637,388,956,025/828,648
6. Step 6: Final answer
   x = 1,975,976.48