Finding the Third Proportional to 5,118 and 10,374

Step by Step Solution

1. Step 1: Write the proportion equation
   5,118 : 10,374 = 10,374 : x
2. Step 2: Convert to fraction form
   5,118/10,374 = 10,374/x
3. Step 3: Cross multiply
   5,118x = 10,374 × 10,374
4. Step 4: Simplify right side
   5,118x = 107,619,876
5. Step 5: Solve for x
   x = 107,619,876/5,118
6. Step 6: Final answer
   x = 21,027.72