Finding the Third Proportional to 645,674 and 1,500,425

Step by Step Solution

1. Step 1: Write the proportion equation
   645,674 : 1,500,425 = 1,500,425 : x
2. Step 2: Convert to fraction form
   645,674/1,500,425 = 1,500,425/x
3. Step 3: Cross multiply
   645,674x = 1,500,425 × 1,500,425
4. Step 4: Simplify right side
   645,674x = 2,251,275,180,625
5. Step 5: Solve for x
   x = 2,251,275,180,625/645,674
6. Step 6: Final answer
   x = 3,486,705.64