Finding the Third Proportional to 411.94 and 628.31

Step by Step Solution

1. Step 1: Write the proportion equation
   411.94 : 628.31 = 628.31 : x
2. Step 2: Convert to fraction form
   411.94/628.31 = 628.31/x
3. Step 3: Cross multiply
   411.94x = 628.31 × 628.31
4. Step 4: Simplify right side
   411.94x = 394,776.60
5. Step 5: Solve for x
   x = 394,776.60/411.94
6. Step 6: Final answer
   x = 958.34