Finding the Third Proportional to 631,424 and 1,321,216

Step by Step Solution

1. Step 1: Write the proportion equation
   631,424 : 1,321,216 = 1,321,216 : x
2. Step 2: Convert to fraction form
   631,424/1,321,216 = 1,321,216/x
3. Step 3: Cross multiply
   631,424x = 1,321,216 × 1,321,216
4. Step 4: Simplify right side
   631,424x = 1,745,611,718,656
5. Step 5: Solve for x
   x = 1,745,611,718,656/631,424
6. Step 6: Final answer
   x = 2,764,563.46