Finding the Third Proportional to 21,280 and 33,679.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,280 : 33,679.75 = 33,679.75 : x
2. Step 2: Convert to fraction form
   21,280/33,679.75 = 33,679.75/x
3. Step 3: Cross multiply
   21,280x = 33,679.75 × 33,679.75
4. Step 4: Simplify right side
   21,280x = 1,134,325,560.06
5. Step 5: Solve for x
   x = 1,134,325,560.06/21,280
6. Step 6: Final answer
   x = 53,304.77