Finding the Third Proportional to 6,623 and 13,790

Step by Step Solution

1. Step 1: Write the proportion equation
   6,623 : 13,790 = 13,790 : x
2. Step 2: Convert to fraction form
   6,623/13,790 = 13,790/x
3. Step 3: Cross multiply
   6,623x = 13,790 × 13,790
4. Step 4: Simplify right side
   6,623x = 190,164,100
5. Step 5: Solve for x
   x = 190,164,100/6,623
6. Step 6: Final answer
   x = 28,712.68