Finding the Third Proportional to 172,562.25 and 353,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,562.25 : 353,488.50 = 353,488.50 : x
2. Step 2: Convert to fraction form
   172,562.25/353,488.50 = 353,488.50/x
3. Step 3: Cross multiply
   172,562.25x = 353,488.50 × 353,488.50
4. Step 4: Simplify right side
   172,562.25x = 124,954,119,632.25
5. Step 5: Solve for x
   x = 124,954,119,632.25/172,562.25
6. Step 6: Final answer
   x = 724,110.40