Finding the Third Proportional to 172,449 and 269,150.63

Step by Step Solution

1. Step 1: Write the proportion equation
   172,449 : 269,150.63 = 269,150.63 : x
2. Step 2: Convert to fraction form
   172,449/269,150.63 = 269,150.63/x
3. Step 3: Cross multiply
   172,449x = 269,150.63 × 269,150.63
4. Step 4: Simplify right side
   172,449x = 72,442,058,937.89
5. Step 5: Solve for x
   x = 72,442,058,937.89/172,449
6. Step 6: Final answer
   x = 420,078.16