Finding the Third Proportional to 155,422.50 and 339,996

Step by Step Solution

1. Step 1: Write the proportion equation
   155,422.50 : 339,996 = 339,996 : x
2. Step 2: Convert to fraction form
   155,422.50/339,996 = 339,996/x
3. Step 3: Cross multiply
   155,422.50x = 339,996 × 339,996
4. Step 4: Simplify right side
   155,422.50x = 115,597,280,016
5. Step 5: Solve for x
   x = 115,597,280,016/155,422.50
6. Step 6: Final answer
   x = 743,761.55