Finding the Third Proportional to 21,280 and 33,216

Step by Step Solution

1. Step 1: Write the proportion equation
   21,280 : 33,216 = 33,216 : x
2. Step 2: Convert to fraction form
   21,280/33,216 = 33,216/x
3. Step 3: Cross multiply
   21,280x = 33,216 × 33,216
4. Step 4: Simplify right side
   21,280x = 1,103,302,656
5. Step 5: Solve for x
   x = 1,103,302,656/21,280
6. Step 6: Final answer
   x = 51,846.93