Finding the Third Proportional to 86,813 and 131,307.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,813 : 131,307.50 = 131,307.50 : x
2. Step 2: Convert to fraction form
   86,813/131,307.50 = 131,307.50/x
3. Step 3: Cross multiply
   86,813x = 131,307.50 × 131,307.50
4. Step 4: Simplify right side
   86,813x = 17,241,659,556.25
5. Step 5: Solve for x
   x = 17,241,659,556.25/86,813
6. Step 6: Final answer
   x = 198,606.89