Finding the Third Proportional to 21,116 and 30,999

Step by Step Solution

1. Step 1: Write the proportion equation
   21,116 : 30,999 = 30,999 : x
2. Step 2: Convert to fraction form
   21,116/30,999 = 30,999/x
3. Step 3: Cross multiply
   21,116x = 30,999 × 30,999
4. Step 4: Simplify right side
   21,116x = 960,938,001
5. Step 5: Solve for x
   x = 960,938,001/21,116
6. Step 6: Final answer
   x = 45,507.58