Finding the Third Proportional to 287,958.50 and 396,945

Step by Step Solution

1. Step 1: Write the proportion equation
   287,958.50 : 396,945 = 396,945 : x
2. Step 2: Convert to fraction form
   287,958.50/396,945 = 396,945/x
3. Step 3: Cross multiply
   287,958.50x = 396,945 × 396,945
4. Step 4: Simplify right side
   287,958.50x = 157,565,333,025
5. Step 5: Solve for x
   x = 157,565,333,025/287,958.50
6. Step 6: Final answer
   x = 547,180.70