Finding the Third Proportional to 10,009 and 21,531

Step by Step Solution

1. Step 1: Write the proportion equation
   10,009 : 21,531 = 21,531 : x
2. Step 2: Convert to fraction form
   10,009/21,531 = 21,531/x
3. Step 3: Cross multiply
   10,009x = 21,531 × 21,531
4. Step 4: Simplify right side
   10,009x = 463,583,961
5. Step 5: Solve for x
   x = 463,583,961/10,009
6. Step 6: Final answer
   x = 46,316.71