Finding the Third Proportional to 295,617 and 648,459

Step by Step Solution

1. Step 1: Write the proportion equation
   295,617 : 648,459 = 648,459 : x
2. Step 2: Convert to fraction form
   295,617/648,459 = 648,459/x
3. Step 3: Cross multiply
   295,617x = 648,459 × 648,459
4. Step 4: Simplify right side
   295,617x = 420,499,074,681
5. Step 5: Solve for x
   x = 420,499,074,681/295,617
6. Step 6: Final answer
   x = 1,422,445.51