Finding the Third Proportional to 9,998 and 21,886

Step by Step Solution

1. Step 1: Write the proportion equation
   9,998 : 21,886 = 21,886 : x
2. Step 2: Convert to fraction form
   9,998/21,886 = 21,886/x
3. Step 3: Cross multiply
   9,998x = 21,886 × 21,886
4. Step 4: Simplify right side
   9,998x = 478,996,996
5. Step 5: Solve for x
   x = 478,996,996/9,998
6. Step 6: Final answer
   x = 47,909.28