Finding the Third Proportional to 5,386 and 10,772

Step by Step Solution

1. Step 1: Write the proportion equation
   5,386 : 10,772 = 10,772 : x
2. Step 2: Convert to fraction form
   5,386/10,772 = 10,772/x
3. Step 3: Cross multiply
   5,386x = 10,772 × 10,772
4. Step 4: Simplify right side
   5,386x = 116,035,984
5. Step 5: Solve for x
   x = 116,035,984/5,386
6. Step 6: Final answer
   x = 21,544