Finding the Third Proportional to 86,233.50 and 128,819.25

Step by Step Solution

1. Step 1: Write the proportion equation
   86,233.50 : 128,819.25 = 128,819.25 : x
2. Step 2: Convert to fraction form
   86,233.50/128,819.25 = 128,819.25/x
3. Step 3: Cross multiply
   86,233.50x = 128,819.25 × 128,819.25
4. Step 4: Simplify right side
   86,233.50x = 16,594,399,170.56
5. Step 5: Solve for x
   x = 16,594,399,170.56/86,233.50
6. Step 6: Final answer
   x = 192,435.64