Finding the Third Proportional to 143,379 and 200,538

Step by Step Solution

1. Step 1: Write the proportion equation
   143,379 : 200,538 = 200,538 : x
2. Step 2: Convert to fraction form
   143,379/200,538 = 200,538/x
3. Step 3: Cross multiply
   143,379x = 200,538 × 200,538
4. Step 4: Simplify right side
   143,379x = 40,215,489,444
5. Step 5: Solve for x
   x = 40,215,489,444/143,379
6. Step 6: Final answer
   x = 280,483.82