Finding the Third Proportional to 679,716 and 1,389,024

Step by Step Solution

1. Step 1: Write the proportion equation
   679,716 : 1,389,024 = 1,389,024 : x
2. Step 2: Convert to fraction form
   679,716/1,389,024 = 1,389,024/x
3. Step 3: Cross multiply
   679,716x = 1,389,024 × 1,389,024
4. Step 4: Simplify right side
   679,716x = 1,929,387,672,576
5. Step 5: Solve for x
   x = 1,929,387,672,576/679,716
6. Step 6: Final answer
   x = 2,838,520.31