Finding the Third Proportional to 86,806.50 and 131,298.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,806.50 : 131,298.50 = 131,298.50 : x
2. Step 2: Convert to fraction form
   86,806.50/131,298.50 = 131,298.50/x
3. Step 3: Cross multiply
   86,806.50x = 131,298.50 × 131,298.50
4. Step 4: Simplify right side
   86,806.50x = 17,239,296,102.25
5. Step 5: Solve for x
   x = 17,239,296,102.25/86,806.50
6. Step 6: Final answer
   x = 198,594.53