Finding the Third Proportional to 172,017 and 260,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,017 : 260,620.50 = 260,620.50 : x
2. Step 2: Convert to fraction form
   172,017/260,620.50 = 260,620.50/x
3. Step 3: Cross multiply
   172,017x = 260,620.50 × 260,620.50
4. Step 4: Simplify right side
   172,017x = 67,923,045,020.25
5. Step 5: Solve for x
   x = 67,923,045,020.25/172,017
6. Step 6: Final answer
   x = 394,862.40