Finding the Third Proportional to 172,417 and 375,872

Step by Step Solution

1. Step 1: Write the proportion equation
   172,417 : 375,872 = 375,872 : x
2. Step 2: Convert to fraction form
   172,417/375,872 = 375,872/x
3. Step 3: Cross multiply
   172,417x = 375,872 × 375,872
4. Step 4: Simplify right side
   172,417x = 141,279,760,384
5. Step 5: Solve for x
   x = 141,279,760,384/172,417
6. Step 6: Final answer
   x = 819,407.37