Finding the Third Proportional to 1,216,634 and 2,647,321

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,634 : 2,647,321 = 2,647,321 : x
2. Step 2: Convert to fraction form
   1,216,634/2,647,321 = 2,647,321/x
3. Step 3: Cross multiply
   1,216,634x = 2,647,321 × 2,647,321
4. Step 4: Simplify right side
   1,216,634x = 7,008,308,477,041
5. Step 5: Solve for x
   x = 7,008,308,477,041/1,216,634
6. Step 6: Final answer
   x = 5,760,408.21