Finding the Third Proportional to 172,831 and 359,457.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,831 : 359,457.50 = 359,457.50 : x
2. Step 2: Convert to fraction form
   172,831/359,457.50 = 359,457.50/x
3. Step 3: Cross multiply
   172,831x = 359,457.50 × 359,457.50
4. Step 4: Simplify right side
   172,831x = 129,209,694,306.25
5. Step 5: Solve for x
   x = 129,209,694,306.25/172,831
6. Step 6: Final answer
   x = 747,607.17