Finding the Third Proportional to 745,636 and 1,620,872

Step by Step Solution

1. Step 1: Write the proportion equation
   745,636 : 1,620,872 = 1,620,872 : x
2. Step 2: Convert to fraction form
   745,636/1,620,872 = 1,620,872/x
3. Step 3: Cross multiply
   745,636x = 1,620,872 × 1,620,872
4. Step 4: Simplify right side
   745,636x = 2,627,226,040,384
5. Step 5: Solve for x
   x = 2,627,226,040,384/745,636
6. Step 6: Final answer
   x = 3,523,469.95