Finding the Third Proportional to 141,255.50 and 209,439

Step by Step Solution

1. Step 1: Write the proportion equation
   141,255.50 : 209,439 = 209,439 : x
2. Step 2: Convert to fraction form
   141,255.50/209,439 = 209,439/x
3. Step 3: Cross multiply
   141,255.50x = 209,439 × 209,439
4. Step 4: Simplify right side
   141,255.50x = 43,864,694,721
5. Step 5: Solve for x
   x = 43,864,694,721/141,255.50
6. Step 6: Final answer
   x = 310,534.42