Finding the Third Proportional to 8,664.38 and 13,410.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,664.38 : 13,410.75 = 13,410.75 : x
2. Step 2: Convert to fraction form
   8,664.38/13,410.75 = 13,410.75/x
3. Step 3: Cross multiply
   8,664.38x = 13,410.75 × 13,410.75
4. Step 4: Simplify right side
   8,664.38x = 179,848,215.56
5. Step 5: Solve for x
   x = 179,848,215.56/8,664.38
6. Step 6: Final answer
   x = 20,757.21