Finding the Third Proportional to 79,717.50 and 108,310.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,717.50 : 108,310.50 = 108,310.50 : x
2. Step 2: Convert to fraction form
   79,717.50/108,310.50 = 108,310.50/x
3. Step 3: Cross multiply
   79,717.50x = 108,310.50 × 108,310.50
4. Step 4: Simplify right side
   79,717.50x = 11,731,164,410.25
5. Step 5: Solve for x
   x = 11,731,164,410.25/79,717.50
6. Step 6: Final answer
   x = 147,159.21