Finding the Third Proportional to 143,815.50 and 225,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,815.50 : 225,139.50 = 225,139.50 : x
2. Step 2: Convert to fraction form
   143,815.50/225,139.50 = 225,139.50/x
3. Step 3: Cross multiply
   143,815.50x = 225,139.50 × 225,139.50
4. Step 4: Simplify right side
   143,815.50x = 50,687,794,460.25
5. Step 5: Solve for x
   x = 50,687,794,460.25/143,815.50
6. Step 6: Final answer
   x = 352,450.15