Finding the Third Proportional to 172,492 and 274,290

Step by Step Solution

1. Step 1: Write the proportion equation
   172,492 : 274,290 = 274,290 : x
2. Step 2: Convert to fraction form
   172,492/274,290 = 274,290/x
3. Step 3: Cross multiply
   172,492x = 274,290 × 274,290
4. Step 4: Simplify right side
   172,492x = 75,235,004,100
5. Step 5: Solve for x
   x = 75,235,004,100/172,492
6. Step 6: Final answer
   x = 436,165.18