Finding the Third Proportional to 122,355 and 172,306.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,355 : 172,306.50 = 172,306.50 : x
2. Step 2: Convert to fraction form
   122,355/172,306.50 = 172,306.50/x
3. Step 3: Cross multiply
   122,355x = 172,306.50 × 172,306.50
4. Step 4: Simplify right side
   122,355x = 29,689,529,942.25
5. Step 5: Solve for x
   x = 29,689,529,942.25/122,355
6. Step 6: Final answer
   x = 242,650.73