Finding the Third Proportional to 172,054.50 and 262,455

Step by Step Solution

1. Step 1: Write the proportion equation
   172,054.50 : 262,455 = 262,455 : x
2. Step 2: Convert to fraction form
   172,054.50/262,455 = 262,455/x
3. Step 3: Cross multiply
   172,054.50x = 262,455 × 262,455
4. Step 4: Simplify right side
   172,054.50x = 68,882,627,025
5. Step 5: Solve for x
   x = 68,882,627,025/172,054.50
6. Step 6: Final answer
   x = 400,353.53