Finding the Third Proportional to 143,353 and 200,503

Step by Step Solution

1. Step 1: Write the proportion equation
   143,353 : 200,503 = 200,503 : x
2. Step 2: Convert to fraction form
   143,353/200,503 = 200,503/x
3. Step 3: Cross multiply
   143,353x = 200,503 × 200,503
4. Step 4: Simplify right side
   143,353x = 40,201,453,009
5. Step 5: Solve for x
   x = 40,201,453,009/143,353
6. Step 6: Final answer
   x = 280,436.78