Finding the Third Proportional to 5,215 and 10,670

Step by Step Solution

1. Step 1: Write the proportion equation
   5,215 : 10,670 = 10,670 : x
2. Step 2: Convert to fraction form
   5,215/10,670 = 10,670/x
3. Step 3: Cross multiply
   5,215x = 10,670 × 10,670
4. Step 4: Simplify right side
   5,215x = 113,848,900
5. Step 5: Solve for x
   x = 113,848,900/5,215
6. Step 6: Final answer
   x = 21,831.05