Finding the Third Proportional to 326,619 and 499,648

Step by Step Solution

1. Step 1: Write the proportion equation
   326,619 : 499,648 = 499,648 : x
2. Step 2: Convert to fraction form
   326,619/499,648 = 499,648/x
3. Step 3: Cross multiply
   326,619x = 499,648 × 499,648
4. Step 4: Simplify right side
   326,619x = 249,648,123,904
5. Step 5: Solve for x
   x = 249,648,123,904/326,619
6. Step 6: Final answer
   x = 764,340.48