Finding the Third Proportional to 63,869.75 and 131,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,869.75 : 131,839.50 = 131,839.50 : x
2. Step 2: Convert to fraction form
   63,869.75/131,839.50 = 131,839.50/x
3. Step 3: Cross multiply
   63,869.75x = 131,839.50 × 131,839.50
4. Step 4: Simplify right side
   63,869.75x = 17,381,653,760.25
5. Step 5: Solve for x
   x = 17,381,653,760.25/63,869.75
6. Step 6: Final answer
   x = 272,142.19