Finding the Third Proportional to 253,143.50 and 356,078

Step by Step Solution

1. Step 1: Write the proportion equation
   253,143.50 : 356,078 = 356,078 : x
2. Step 2: Convert to fraction form
   253,143.50/356,078 = 356,078/x
3. Step 3: Cross multiply
   253,143.50x = 356,078 × 356,078
4. Step 4: Simplify right side
   253,143.50x = 126,791,542,084
5. Step 5: Solve for x
   x = 126,791,542,084/253,143.50
6. Step 6: Final answer
   x = 500,868.25