Finding the Third Proportional to 86,800.50 and 131,134.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,800.50 : 131,134.50 = 131,134.50 : x
2. Step 2: Convert to fraction form
   86,800.50/131,134.50 = 131,134.50/x
3. Step 3: Cross multiply
   86,800.50x = 131,134.50 × 131,134.50
4. Step 4: Simplify right side
   86,800.50x = 17,196,257,090.25
5. Step 5: Solve for x
   x = 17,196,257,090.25/86,800.50
6. Step 6: Final answer
   x = 198,112.42