Finding the Third Proportional to 155,323.50 and 339,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,323.50 : 339,721.50 = 339,721.50 : x
2. Step 2: Convert to fraction form
   155,323.50/339,721.50 = 339,721.50/x
3. Step 3: Cross multiply
   155,323.50x = 339,721.50 × 339,721.50
4. Step 4: Simplify right side
   155,323.50x = 115,410,697,562.25
5. Step 5: Solve for x
   x = 115,410,697,562.25/155,323.50
6. Step 6: Final answer
   x = 743,034.36