Finding the Third Proportional to 8,469.56 and 12,581.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,469.56 : 12,581.81 = 12,581.81 : x
2. Step 2: Convert to fraction form
   8,469.56/12,581.81 = 12,581.81/x
3. Step 3: Cross multiply
   8,469.56x = 12,581.81 × 12,581.81
4. Step 4: Simplify right side
   8,469.56x = 158,302,005.79
5. Step 5: Solve for x
   x = 158,302,005.79/8,469.56
6. Step 6: Final answer
   x = 18,690.69