Finding the Third Proportional to 641,576 and 1,298,704

Step by Step Solution

1. Step 1: Write the proportion equation
   641,576 : 1,298,704 = 1,298,704 : x
2. Step 2: Convert to fraction form
   641,576/1,298,704 = 1,298,704/x
3. Step 3: Cross multiply
   641,576x = 1,298,704 × 1,298,704
4. Step 4: Simplify right side
   641,576x = 1,686,632,079,616
5. Step 5: Solve for x
   x = 1,686,632,079,616/641,576
6. Step 6: Final answer
   x = 2,628,888.99