Finding the Third Proportional to 328,812 and 718,500

Step by Step Solution

1. Step 1: Write the proportion equation
   328,812 : 718,500 = 718,500 : x
2. Step 2: Convert to fraction form
   328,812/718,500 = 718,500/x
3. Step 3: Cross multiply
   328,812x = 718,500 × 718,500
4. Step 4: Simplify right side
   328,812x = 516,242,250,000
5. Step 5: Solve for x
   x = 516,242,250,000/328,812
6. Step 6: Final answer
   x = 1,570,022.54