Finding the Third Proportional to 8,357.50 and 12,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,357.50 : 12,956.50 = 12,956.50 : x
2. Step 2: Convert to fraction form
   8,357.50/12,956.50 = 12,956.50/x
3. Step 3: Cross multiply
   8,357.50x = 12,956.50 × 12,956.50
4. Step 4: Simplify right side
   8,357.50x = 167,870,892.25
5. Step 5: Solve for x
   x = 167,870,892.25/8,357.50
6. Step 6: Final answer
   x = 20,086.26