Finding the Third Proportional to 172,521 and 375,417

Step by Step Solution

1. Step 1: Write the proportion equation
   172,521 : 375,417 = 375,417 : x
2. Step 2: Convert to fraction form
   172,521/375,417 = 375,417/x
3. Step 3: Cross multiply
   172,521x = 375,417 × 375,417
4. Step 4: Simplify right side
   172,521x = 140,937,923,889
5. Step 5: Solve for x
   x = 140,937,923,889/172,521
6. Step 6: Final answer
   x = 816,931.99