Finding the Third Proportional to 443,131 and 687,457.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,131 : 687,457.50 = 687,457.50 : x
2. Step 2: Convert to fraction form
   443,131/687,457.50 = 687,457.50/x
3. Step 3: Cross multiply
   443,131x = 687,457.50 × 687,457.50
4. Step 4: Simplify right side
   443,131x = 472,597,814,306.25
5. Step 5: Solve for x
   x = 472,597,814,306.25/443,131
6. Step 6: Final answer
   x = 1,066,496.85