Finding the Third Proportional to 12,869 and 20,613

Step by Step Solution

1. Step 1: Write the proportion equation
   12,869 : 20,613 = 20,613 : x
2. Step 2: Convert to fraction form
   12,869/20,613 = 20,613/x
3. Step 3: Cross multiply
   12,869x = 20,613 × 20,613
4. Step 4: Simplify right side
   12,869x = 424,895,769
5. Step 5: Solve for x
   x = 424,895,769/12,869
6. Step 6: Final answer
   x = 33,017.00