Finding the Third Proportional to 8,718 and 13,788

Step by Step Solution

1. Step 1: Write the proportion equation
   8,718 : 13,788 = 13,788 : x
2. Step 2: Convert to fraction form
   8,718/13,788 = 13,788/x
3. Step 3: Cross multiply
   8,718x = 13,788 × 13,788
4. Step 4: Simplify right side
   8,718x = 190,108,944
5. Step 5: Solve for x
   x = 190,108,944/8,718
6. Step 6: Final answer
   x = 21,806.49