Finding the Third Proportional to 5,058 and 10,359

Step by Step Solution

1. Step 1: Write the proportion equation
   5,058 : 10,359 = 10,359 : x
2. Step 2: Convert to fraction form
   5,058/10,359 = 10,359/x
3. Step 3: Cross multiply
   5,058x = 10,359 × 10,359
4. Step 4: Simplify right side
   5,058x = 107,308,881
5. Step 5: Solve for x
   x = 107,308,881/5,058
6. Step 6: Final answer
   x = 21,215.67