Finding the Third Proportional to 144,909 and 213,167.25

Step by Step Solution

1. Step 1: Write the proportion equation
   144,909 : 213,167.25 = 213,167.25 : x
2. Step 2: Convert to fraction form
   144,909/213,167.25 = 213,167.25/x
3. Step 3: Cross multiply
   144,909x = 213,167.25 × 213,167.25
4. Step 4: Simplify right side
   144,909x = 45,440,276,472.56
5. Step 5: Solve for x
   x = 45,440,276,472.56/144,909
6. Step 6: Final answer
   x = 313,578.01