Finding the Third Proportional to 9,886 and 18,858

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886 : 18,858 = 18,858 : x
2. Step 2: Convert to fraction form
   9,886/18,858 = 18,858/x
3. Step 3: Cross multiply
   9,886x = 18,858 × 18,858
4. Step 4: Simplify right side
   9,886x = 355,624,164
5. Step 5: Solve for x
   x = 355,624,164/9,886
6. Step 6: Final answer
   x = 35,972.50