Finding the Third Proportional to 326,738.50 and 499,720

Step by Step Solution

1. Step 1: Write the proportion equation
   326,738.50 : 499,720 = 499,720 : x
2. Step 2: Convert to fraction form
   326,738.50/499,720 = 499,720/x
3. Step 3: Cross multiply
   326,738.50x = 499,720 × 499,720
4. Step 4: Simplify right side
   326,738.50x = 249,720,078,400
5. Step 5: Solve for x
   x = 249,720,078,400/326,738.50
6. Step 6: Final answer
   x = 764,281.16