Finding the Third Proportional to 1,822,784 and 3,988,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,822,784 : 3,988,678 = 3,988,678 : x
2. Step 2: Convert to fraction form
   1,822,784/3,988,678 = 3,988,678/x
3. Step 3: Cross multiply
   1,822,784x = 3,988,678 × 3,988,678
4. Step 4: Simplify right side
   1,822,784x = 15,909,552,187,684
5. Step 5: Solve for x
   x = 15,909,552,187,684/1,822,784
6. Step 6: Final answer
   x = 8,728,160.98