Finding the Third Proportional to 155,951.50 and 328,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,951.50 : 328,200.50 = 328,200.50 : x
2. Step 2: Convert to fraction form
   155,951.50/328,200.50 = 328,200.50/x
3. Step 3: Cross multiply
   155,951.50x = 328,200.50 × 328,200.50
4. Step 4: Simplify right side
   155,951.50x = 107,715,568,200.25
5. Step 5: Solve for x
   x = 107,715,568,200.25/155,951.50
6. Step 6: Final answer
   x = 690,699.15