Finding the Third Proportional to 172,570.50 and 353,511

Step by Step Solution

1. Step 1: Write the proportion equation
   172,570.50 : 353,511 = 353,511 : x
2. Step 2: Convert to fraction form
   172,570.50/353,511 = 353,511/x
3. Step 3: Cross multiply
   172,570.50x = 353,511 × 353,511
4. Step 4: Simplify right side
   172,570.50x = 124,970,027,121
5. Step 5: Solve for x
   x = 124,970,027,121/172,570.50
6. Step 6: Final answer
   x = 724,167.96