Finding the Third Proportional to 155,242.50 and 339,543

Step by Step Solution

1. Step 1: Write the proportion equation
   155,242.50 : 339,543 = 339,543 : x
2. Step 2: Convert to fraction form
   155,242.50/339,543 = 339,543/x
3. Step 3: Cross multiply
   155,242.50x = 339,543 × 339,543
4. Step 4: Simplify right side
   155,242.50x = 115,289,448,849
5. Step 5: Solve for x
   x = 115,289,448,849/155,242.50
6. Step 6: Final answer
   x = 742,641.02