Finding the Third Proportional to 641,616 and 1,392,510

Step by Step Solution

1. Step 1: Write the proportion equation
   641,616 : 1,392,510 = 1,392,510 : x
2. Step 2: Convert to fraction form
   641,616/1,392,510 = 1,392,510/x
3. Step 3: Cross multiply
   641,616x = 1,392,510 × 1,392,510
4. Step 4: Simplify right side
   641,616x = 1,939,084,100,100
5. Step 5: Solve for x
   x = 1,939,084,100,100/641,616
6. Step 6: Final answer
   x = 3,022,187.88