Finding the Third Proportional to 1,822,689 and 3,988,656

Step by Step Solution

1. Step 1: Write the proportion equation
   1,822,689 : 3,988,656 = 3,988,656 : x
2. Step 2: Convert to fraction form
   1,822,689/3,988,656 = 3,988,656/x
3. Step 3: Cross multiply
   1,822,689x = 3,988,656 × 3,988,656
4. Step 4: Simplify right side
   1,822,689x = 15,909,376,686,336
5. Step 5: Solve for x
   x = 15,909,376,686,336/1,822,689
6. Step 6: Final answer
   x = 8,728,519.61