Finding the Third Proportional to 343,866 and 746,809.50

Step by Step Solution

1. Step 1: Write the proportion equation
   343,866 : 746,809.50 = 746,809.50 : x
2. Step 2: Convert to fraction form
   343,866/746,809.50 = 746,809.50/x
3. Step 3: Cross multiply
   343,866x = 746,809.50 × 746,809.50
4. Step 4: Simplify right side
   343,866x = 557,724,429,290.25
5. Step 5: Solve for x
   x = 557,724,429,290.25/343,866
6. Step 6: Final answer
   x = 1,621,923.74