Finding the Third Proportional to 978,672 and 2,149,799

Step by Step Solution

1. Step 1: Write the proportion equation
   978,672 : 2,149,799 = 2,149,799 : x
2. Step 2: Convert to fraction form
   978,672/2,149,799 = 2,149,799/x
3. Step 3: Cross multiply
   978,672x = 2,149,799 × 2,149,799
4. Step 4: Simplify right side
   978,672x = 4,621,635,740,401
5. Step 5: Solve for x
   x = 4,621,635,740,401/978,672
6. Step 6: Final answer
   x = 4,722,354.11