Finding the Third Proportional to 271,366.50 and 398,910

Step by Step Solution

1. Step 1: Write the proportion equation
   271,366.50 : 398,910 = 398,910 : x
2. Step 2: Convert to fraction form
   271,366.50/398,910 = 398,910/x
3. Step 3: Cross multiply
   271,366.50x = 398,910 × 398,910
4. Step 4: Simplify right side
   271,366.50x = 159,129,188,100
5. Step 5: Solve for x
   x = 159,129,188,100/271,366.50
6. Step 6: Final answer
   x = 586,399.53