Finding the Third Proportional to 828,812 and 1,279,830

Step by Step Solution

1. Step 1: Write the proportion equation
   828,812 : 1,279,830 = 1,279,830 : x
2. Step 2: Convert to fraction form
   828,812/1,279,830 = 1,279,830/x
3. Step 3: Cross multiply
   828,812x = 1,279,830 × 1,279,830
4. Step 4: Simplify right side
   828,812x = 1,637,964,828,900
5. Step 5: Solve for x
   x = 1,637,964,828,900/828,812
6. Step 6: Final answer
   x = 1,976,280.30