Finding the Third Proportional to 155,499 and 339,133.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,499 : 339,133.50 = 339,133.50 : x
2. Step 2: Convert to fraction form
   155,499/339,133.50 = 339,133.50/x
3. Step 3: Cross multiply
   155,499x = 339,133.50 × 339,133.50
4. Step 4: Simplify right side
   155,499x = 115,011,530,822.25
5. Step 5: Solve for x
   x = 115,011,530,822.25/155,499
6. Step 6: Final answer
   x = 739,628.75