Finding the Third Proportional to 718,642 and 1,564,780

Step by Step Solution

1. Step 1: Write the proportion equation
   718,642 : 1,564,780 = 1,564,780 : x
2. Step 2: Convert to fraction form
   718,642/1,564,780 = 1,564,780/x
3. Step 3: Cross multiply
   718,642x = 1,564,780 × 1,564,780
4. Step 4: Simplify right side
   718,642x = 2,448,536,448,400
5. Step 5: Solve for x
   x = 2,448,536,448,400/718,642
6. Step 6: Final answer
   x = 3,407,171.37