Finding the Third Proportional to 326,718 and 443,412

Step by Step Solution

1. Step 1: Write the proportion equation
   326,718 : 443,412 = 443,412 : x
2. Step 2: Convert to fraction form
   326,718/443,412 = 443,412/x
3. Step 3: Cross multiply
   326,718x = 443,412 × 443,412
4. Step 4: Simplify right side
   326,718x = 196,614,201,744
5. Step 5: Solve for x
   x = 196,614,201,744/326,718
6. Step 6: Final answer
   x = 601,785.64