Finding the Third Proportional to 326,739 and 499,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,739 : 499,720.50 = 499,720.50 : x
2. Step 2: Convert to fraction form
   326,739/499,720.50 = 499,720.50/x
3. Step 3: Cross multiply
   326,739x = 499,720.50 × 499,720.50
4. Step 4: Simplify right side
   326,739x = 249,720,578,120.25
5. Step 5: Solve for x
   x = 249,720,578,120.25/326,739
6. Step 6: Final answer
   x = 764,281.52