Finding the Third Proportional to 8,518.50 and 12,726

Step by Step Solution

1. Step 1: Write the proportion equation
   8,518.50 : 12,726 = 12,726 : x
2. Step 2: Convert to fraction form
   8,518.50/12,726 = 12,726/x
3. Step 3: Cross multiply
   8,518.50x = 12,726 × 12,726
4. Step 4: Simplify right side
   8,518.50x = 161,951,076
5. Step 5: Solve for x
   x = 161,951,076/8,518.50
6. Step 6: Final answer
   x = 19,011.69