Finding the Third Proportional to 144,928.50 and 309,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,928.50 : 309,760.50 = 309,760.50 : x
2. Step 2: Convert to fraction form
   144,928.50/309,760.50 = 309,760.50/x
3. Step 3: Cross multiply
   144,928.50x = 309,760.50 × 309,760.50
4. Step 4: Simplify right side
   144,928.50x = 95,951,567,360.25
5. Step 5: Solve for x
   x = 95,951,567,360.25/144,928.50
6. Step 6: Final answer
   x = 662,061.41