Finding the Third Proportional to 86,901.75 and 131,578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,901.75 : 131,578.50 = 131,578.50 : x
2. Step 2: Convert to fraction form
   86,901.75/131,578.50 = 131,578.50/x
3. Step 3: Cross multiply
   86,901.75x = 131,578.50 × 131,578.50
4. Step 4: Simplify right side
   86,901.75x = 17,312,901,662.25
5. Step 5: Solve for x
   x = 17,312,901,662.25/86,901.75
6. Step 6: Final answer
   x = 199,223.86