Finding the Third Proportional to 8,353.50 and 12,928.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,353.50 : 12,928.50 = 12,928.50 : x
2. Step 2: Convert to fraction form
   8,353.50/12,928.50 = 12,928.50/x
3. Step 3: Cross multiply
   8,353.50x = 12,928.50 × 12,928.50
4. Step 4: Simplify right side
   8,353.50x = 167,146,112.25
5. Step 5: Solve for x
   x = 167,146,112.25/8,353.50
6. Step 6: Final answer
   x = 20,009.11