Finding the Third Proportional to 6,778 and 13,880

Step by Step Solution

1. Step 1: Write the proportion equation
   6,778 : 13,880 = 13,880 : x
2. Step 2: Convert to fraction form
   6,778/13,880 = 13,880/x
3. Step 3: Cross multiply
   6,778x = 13,880 × 13,880
4. Step 4: Simplify right side
   6,778x = 192,654,400
5. Step 5: Solve for x
   x = 192,654,400/6,778
6. Step 6: Final answer
   x = 28,423.49