Finding the Third Proportional to 21,408 and 50,400

Step by Step Solution

1. Step 1: Write the proportion equation
   21,408 : 50,400 = 50,400 : x
2. Step 2: Convert to fraction form
   21,408/50,400 = 50,400/x
3. Step 3: Cross multiply
   21,408x = 50,400 × 50,400
4. Step 4: Simplify right side
   21,408x = 2,540,160,000
5. Step 5: Solve for x
   x = 2,540,160,000/21,408
6. Step 6: Final answer
   x = 118,654.71