Finding the Third Proportional to 326,604 and 666,329.50

Step by Step Solution

1. Step 1: Write the proportion equation
   326,604 : 666,329.50 = 666,329.50 : x
2. Step 2: Convert to fraction form
   326,604/666,329.50 = 666,329.50/x
3. Step 3: Cross multiply
   326,604x = 666,329.50 × 666,329.50
4. Step 4: Simplify right side
   326,604x = 443,995,002,570.25
5. Step 5: Solve for x
   x = 443,995,002,570.25/326,604
6. Step 6: Final answer
   x = 1,359,429.16