Finding the Third Proportional to 19,871 and 30,009

Step by Step Solution

1. Step 1: Write the proportion equation
   19,871 : 30,009 = 30,009 : x
2. Step 2: Convert to fraction form
   19,871/30,009 = 30,009/x
3. Step 3: Cross multiply
   19,871x = 30,009 × 30,009
4. Step 4: Simplify right side
   19,871x = 900,540,081
5. Step 5: Solve for x
   x = 900,540,081/19,871
6. Step 6: Final answer
   x = 45,319.31