Finding the Third Proportional to 820,708 and 1,227,780

Step by Step Solution

1. Step 1: Write the proportion equation
   820,708 : 1,227,780 = 1,227,780 : x
2. Step 2: Convert to fraction form
   820,708/1,227,780 = 1,227,780/x
3. Step 3: Cross multiply
   820,708x = 1,227,780 × 1,227,780
4. Step 4: Simplify right side
   820,708x = 1,507,443,728,400
5. Step 5: Solve for x
   x = 1,507,443,728,400/820,708
6. Step 6: Final answer
   x = 1,836,760.12