Finding the Third Proportional to 172,573 and 353,510

Step by Step Solution

1. Step 1: Write the proportion equation
   172,573 : 353,510 = 353,510 : x
2. Step 2: Convert to fraction form
   172,573/353,510 = 353,510/x
3. Step 3: Cross multiply
   172,573x = 353,510 × 353,510
4. Step 4: Simplify right side
   172,573x = 124,969,320,100
5. Step 5: Solve for x
   x = 124,969,320,100/172,573
6. Step 6: Final answer
   x = 724,153.37