Finding the Third Proportional to 82,131.75 and 90,771.75

Step by Step Solution

1. Step 1: Write the proportion equation
   82,131.75 : 90,771.75 = 90,771.75 : x
2. Step 2: Convert to fraction form
   82,131.75/90,771.75 = 90,771.75/x
3. Step 3: Cross multiply
   82,131.75x = 90,771.75 × 90,771.75
4. Step 4: Simplify right side
   82,131.75x = 8,239,510,598.06
5. Step 5: Solve for x
   x = 8,239,510,598.06/82,131.75
6. Step 6: Final answer
   x = 100,320.65