Finding the Third Proportional to 8,216.44 and 12,719.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216.44 : 12,719.53 = 12,719.53 : x
2. Step 2: Convert to fraction form
   8,216.44/12,719.53 = 12,719.53/x
3. Step 3: Cross multiply
   8,216.44x = 12,719.53 × 12,719.53
4. Step 4: Simplify right side
   8,216.44x = 161,786,475.22
5. Step 5: Solve for x
   x = 161,786,475.22/8,216.44
6. Step 6: Final answer
   x = 19,690.59