Finding the Third Proportional to 5,217.75 and 8,091.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,217.75 : 8,091.56 = 8,091.56 : x
2. Step 2: Convert to fraction form
   5,217.75/8,091.56 = 8,091.56/x
3. Step 3: Cross multiply
   5,217.75x = 8,091.56 × 8,091.56
4. Step 4: Simplify right side
   5,217.75x = 65,473,383.69
5. Step 5: Solve for x
   x = 65,473,383.69/5,217.75
6. Step 6: Final answer
   x = 12,548.20