Finding the Third Proportional to 5,615,684 and 8,212,918

Step by Step Solution

1. Step 1: Write the proportion equation
   5,615,684 : 8,212,918 = 8,212,918 : x
2. Step 2: Convert to fraction form
   5,615,684/8,212,918 = 8,212,918/x
3. Step 3: Cross multiply
   5,615,684x = 8,212,918 × 8,212,918
4. Step 4: Simplify right side
   5,615,684x = 67,452,022,074,724
5. Step 5: Solve for x
   x = 67,452,022,074,724/5,615,684
6. Step 6: Final answer
   x = 12,011,363.54