Finding the Third Proportional to 172,390 and 365,304

Step by Step Solution

1. Step 1: Write the proportion equation
   172,390 : 365,304 = 365,304 : x
2. Step 2: Convert to fraction form
   172,390/365,304 = 365,304/x
3. Step 3: Cross multiply
   172,390x = 365,304 × 365,304
4. Step 4: Simplify right side
   172,390x = 133,447,012,416
5. Step 5: Solve for x
   x = 133,447,012,416/172,390
6. Step 6: Final answer
   x = 774,099.50