Finding the Third Proportional to 394,535.50 and 558,260

Step by Step Solution

1. Step 1: Write the proportion equation
   394,535.50 : 558,260 = 558,260 : x
2. Step 2: Convert to fraction form
   394,535.50/558,260 = 558,260/x
3. Step 3: Cross multiply
   394,535.50x = 558,260 × 558,260
4. Step 4: Simplify right side
   394,535.50x = 311,654,227,600
5. Step 5: Solve for x
   x = 311,654,227,600/394,535.50
6. Step 6: Final answer
   x = 789,926.96