Finding the Third Proportional to 155,949 and 328,192.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,949 : 328,192.50 = 328,192.50 : x
2. Step 2: Convert to fraction form
   155,949/328,192.50 = 328,192.50/x
3. Step 3: Cross multiply
   155,949x = 328,192.50 × 328,192.50
4. Step 4: Simplify right side
   155,949x = 107,710,317,056.25
5. Step 5: Solve for x
   x = 107,710,317,056.25/155,949
6. Step 6: Final answer
   x = 690,676.55