Finding the Third Proportional to 172,561.50 and 353,493

Step by Step Solution

1. Step 1: Write the proportion equation
   172,561.50 : 353,493 = 353,493 : x
2. Step 2: Convert to fraction form
   172,561.50/353,493 = 353,493/x
3. Step 3: Cross multiply
   172,561.50x = 353,493 × 353,493
4. Step 4: Simplify right side
   172,561.50x = 124,957,301,049
5. Step 5: Solve for x
   x = 124,957,301,049/172,561.50
6. Step 6: Final answer
   x = 724,131.98