Finding the Third Proportional to 68,620.50 and 81,087.75

Step by Step Solution

1. Step 1: Write the proportion equation
   68,620.50 : 81,087.75 = 81,087.75 : x
2. Step 2: Convert to fraction form
   68,620.50/81,087.75 = 81,087.75/x
3. Step 3: Cross multiply
   68,620.50x = 81,087.75 × 81,087.75
4. Step 4: Simplify right side
   68,620.50x = 6,575,223,200.06
5. Step 5: Solve for x
   x = 6,575,223,200.06/68,620.50
6. Step 6: Final answer
   x = 95,820.10