Finding the Third Proportional to 172,572 and 353,508

Step by Step Solution

1. Step 1: Write the proportion equation
   172,572 : 353,508 = 353,508 : x
2. Step 2: Convert to fraction form
   172,572/353,508 = 353,508/x
3. Step 3: Cross multiply
   172,572x = 353,508 × 353,508
4. Step 4: Simplify right side
   172,572x = 124,967,906,064
5. Step 5: Solve for x
   x = 124,967,906,064/172,572
6. Step 6: Final answer
   x = 724,149.38