Finding the Third Proportional to 339,636 and 726,829.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,636 : 726,829.50 = 726,829.50 : x
2. Step 2: Convert to fraction form
   339,636/726,829.50 = 726,829.50/x
3. Step 3: Cross multiply
   339,636x = 726,829.50 × 726,829.50
4. Step 4: Simplify right side
   339,636x = 528,281,122,070.25
5. Step 5: Solve for x
   x = 528,281,122,070.25/339,636
6. Step 6: Final answer
   x = 1,555,433.23