Finding the Third Proportional to 5,456 and 10,876

Step by Step Solution

1. Step 1: Write the proportion equation
   5,456 : 10,876 = 10,876 : x
2. Step 2: Convert to fraction form
   5,456/10,876 = 10,876/x
3. Step 3: Cross multiply
   5,456x = 10,876 × 10,876
4. Step 4: Simplify right side
   5,456x = 118,287,376
5. Step 5: Solve for x
   x = 118,287,376/5,456
6. Step 6: Final answer
   x = 21,680.24