Finding the Third Proportional to 172,570 and 353,504

Step by Step Solution

1. Step 1: Write the proportion equation
   172,570 : 353,504 = 353,504 : x
2. Step 2: Convert to fraction form
   172,570/353,504 = 353,504/x
3. Step 3: Cross multiply
   172,570x = 353,504 × 353,504
4. Step 4: Simplify right side
   172,570x = 124,965,078,016
5. Step 5: Solve for x
   x = 124,965,078,016/172,570
6. Step 6: Final answer
   x = 724,141.38