Finding the Third Proportional to 155,929.50 and 328,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,929.50 : 328,158.50 = 328,158.50 : x
2. Step 2: Convert to fraction form
   155,929.50/328,158.50 = 328,158.50/x
3. Step 3: Cross multiply
   155,929.50x = 328,158.50 × 328,158.50
4. Step 4: Simplify right side
   155,929.50x = 107,688,001,122.25
5. Step 5: Solve for x
   x = 107,688,001,122.25/155,929.50
6. Step 6: Final answer
   x = 690,619.81