Finding the Third Proportional to 72,716.50 and 106,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,716.50 : 106,680.50 = 106,680.50 : x
2. Step 2: Convert to fraction form
   72,716.50/106,680.50 = 106,680.50/x
3. Step 3: Cross multiply
   72,716.50x = 106,680.50 × 106,680.50
4. Step 4: Simplify right side
   72,716.50x = 11,380,729,080.25
5. Step 5: Solve for x
   x = 11,380,729,080.25/72,716.50
6. Step 6: Final answer
   x = 156,508.21