Finding the Third Proportional to 143,203.50 and 308,538

Step by Step Solution

1. Step 1: Write the proportion equation
   143,203.50 : 308,538 = 308,538 : x
2. Step 2: Convert to fraction form
   143,203.50/308,538 = 308,538/x
3. Step 3: Cross multiply
   143,203.50x = 308,538 × 308,538
4. Step 4: Simplify right side
   143,203.50x = 95,195,697,444
5. Step 5: Solve for x
   x = 95,195,697,444/143,203.50
6. Step 6: Final answer
   x = 664,758.18