Finding the Third Proportional to 9,886 and 21,528

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886 : 21,528 = 21,528 : x
2. Step 2: Convert to fraction form
   9,886/21,528 = 21,528/x
3. Step 3: Cross multiply
   9,886x = 21,528 × 21,528
4. Step 4: Simplify right side
   9,886x = 463,454,784
5. Step 5: Solve for x
   x = 463,454,784/9,886
6. Step 6: Final answer
   x = 46,879.91