Finding the Third Proportional to 9,878 and 21,484

Step by Step Solution

1. Step 1: Write the proportion equation
   9,878 : 21,484 = 21,484 : x
2. Step 2: Convert to fraction form
   9,878/21,484 = 21,484/x
3. Step 3: Cross multiply
   9,878x = 21,484 × 21,484
4. Step 4: Simplify right side
   9,878x = 461,562,256
5. Step 5: Solve for x
   x = 461,562,256/9,878
6. Step 6: Final answer
   x = 46,726.29