Finding the Third Proportional to 642,612 and 1,395,846

Step by Step Solution

1. Step 1: Write the proportion equation
   642,612 : 1,395,846 = 1,395,846 : x
2. Step 2: Convert to fraction form
   642,612/1,395,846 = 1,395,846/x
3. Step 3: Cross multiply
   642,612x = 1,395,846 × 1,395,846
4. Step 4: Simplify right side
   642,612x = 1,948,386,055,716
5. Step 5: Solve for x
   x = 1,948,386,055,716/642,612
6. Step 6: Final answer
   x = 3,031,978.95