Finding the Third Proportional to 485,442 and 728,162

Step by Step Solution

1. Step 1: Write the proportion equation
   485,442 : 728,162 = 728,162 : x
2. Step 2: Convert to fraction form
   485,442/728,162 = 728,162/x
3. Step 3: Cross multiply
   485,442x = 728,162 × 728,162
4. Step 4: Simplify right side
   485,442x = 530,219,898,244
5. Step 5: Solve for x
   x = 530,219,898,244/485,442
6. Step 6: Final answer
   x = 1,092,241.50