Finding the Third Proportional to 326,219 and 718,665

Step by Step Solution

1. Step 1: Write the proportion equation
   326,219 : 718,665 = 718,665 : x
2. Step 2: Convert to fraction form
   326,219/718,665 = 718,665/x
3. Step 3: Cross multiply
   326,219x = 718,665 × 718,665
4. Step 4: Simplify right side
   326,219x = 516,479,382,225
5. Step 5: Solve for x
   x = 516,479,382,225/326,219
6. Step 6: Final answer
   x = 1,583,229.00