Finding the Third Proportional to 172,501 and 261,669.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,501 : 261,669.50 = 261,669.50 : x
2. Step 2: Convert to fraction form
   172,501/261,669.50 = 261,669.50/x
3. Step 3: Cross multiply
   172,501x = 261,669.50 × 261,669.50
4. Step 4: Simplify right side
   172,501x = 68,470,927,230.25
5. Step 5: Solve for x
   x = 68,470,927,230.25/172,501
6. Step 6: Final answer
   x = 396,930.61