Finding the Third Proportional to 21,008 and 30,216

Step by Step Solution

1. Step 1: Write the proportion equation
   21,008 : 30,216 = 30,216 : x
2. Step 2: Convert to fraction form
   21,008/30,216 = 30,216/x
3. Step 3: Cross multiply
   21,008x = 30,216 × 30,216
4. Step 4: Simplify right side
   21,008x = 913,006,656
5. Step 5: Solve for x
   x = 913,006,656/21,008
6. Step 6: Final answer
   x = 43,459.95