Finding the Third Proportional to 131,708 and 288,503

Step by Step Solution

1. Step 1: Write the proportion equation
   131,708 : 288,503 = 288,503 : x
2. Step 2: Convert to fraction form
   131,708/288,503 = 288,503/x
3. Step 3: Cross multiply
   131,708x = 288,503 × 288,503
4. Step 4: Simplify right side
   131,708x = 83,233,981,009
5. Step 5: Solve for x
   x = 83,233,981,009/131,708
6. Step 6: Final answer
   x = 631,958.43