Finding the Third Proportional to 5,615,629 and 8,212,843

Step by Step Solution

1. Step 1: Write the proportion equation
   5,615,629 : 8,212,843 = 8,212,843 : x
2. Step 2: Convert to fraction form
   5,615,629/8,212,843 = 8,212,843/x
3. Step 3: Cross multiply
   5,615,629x = 8,212,843 × 8,212,843
4. Step 4: Simplify right side
   5,615,629x = 67,450,790,142,649
5. Step 5: Solve for x
   x = 67,450,790,142,649/5,615,629
6. Step 6: Final answer
   x = 12,011,261.81