Finding the Third Proportional to 647,584 and 1,320,856

Step by Step Solution

1. Step 1: Write the proportion equation
   647,584 : 1,320,856 = 1,320,856 : x
2. Step 2: Convert to fraction form
   647,584/1,320,856 = 1,320,856/x
3. Step 3: Cross multiply
   647,584x = 1,320,856 × 1,320,856
4. Step 4: Simplify right side
   647,584x = 1,744,660,572,736
5. Step 5: Solve for x
   x = 1,744,660,572,736/647,584
6. Step 6: Final answer
   x = 2,694,106.98