Finding the Third Proportional to 394,540.50 and 558,267

Step by Step Solution

1. Step 1: Write the proportion equation
   394,540.50 : 558,267 = 558,267 : x
2. Step 2: Convert to fraction form
   394,540.50/558,267 = 558,267/x
3. Step 3: Cross multiply
   394,540.50x = 558,267 × 558,267
4. Step 4: Simplify right side
   394,540.50x = 311,662,043,289
5. Step 5: Solve for x
   x = 311,662,043,289/394,540.50
6. Step 6: Final answer
   x = 789,936.76