Finding the Third Proportional to 643,704 and 1,370,568

Step by Step Solution

1. Step 1: Write the proportion equation
   643,704 : 1,370,568 = 1,370,568 : x
2. Step 2: Convert to fraction form
   643,704/1,370,568 = 1,370,568/x
3. Step 3: Cross multiply
   643,704x = 1,370,568 × 1,370,568
4. Step 4: Simplify right side
   643,704x = 1,878,456,642,624
5. Step 5: Solve for x
   x = 1,878,456,642,624/643,704
6. Step 6: Final answer
   x = 2,918,199.42