Finding the Third Proportional to 172,522 and 375,418

Step by Step Solution

1. Step 1: Write the proportion equation
   172,522 : 375,418 = 375,418 : x
2. Step 2: Convert to fraction form
   172,522/375,418 = 375,418/x
3. Step 3: Cross multiply
   172,522x = 375,418 × 375,418
4. Step 4: Simplify right side
   172,522x = 140,938,674,724
5. Step 5: Solve for x
   x = 140,938,674,724/172,522
6. Step 6: Final answer
   x = 816,931.61