Finding the Third Proportional to 986,408 and 2,155,456

Step by Step Solution

1. Step 1: Write the proportion equation
   986,408 : 2,155,456 = 2,155,456 : x
2. Step 2: Convert to fraction form
   986,408/2,155,456 = 2,155,456/x
3. Step 3: Cross multiply
   986,408x = 2,155,456 × 2,155,456
4. Step 4: Simplify right side
   986,408x = 4,645,990,567,936
5. Step 5: Solve for x
   x = 4,645,990,567,936/986,408
6. Step 6: Final answer
   x = 4,710,009.01