Finding the Third Proportional to 21,404 and 28,408.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,404 : 28,408.50 = 28,408.50 : x
2. Step 2: Convert to fraction form
   21,404/28,408.50 = 28,408.50/x
3. Step 3: Cross multiply
   21,404x = 28,408.50 × 28,408.50
4. Step 4: Simplify right side
   21,404x = 807,042,872.25
5. Step 5: Solve for x
   x = 807,042,872.25/21,404
6. Step 6: Final answer
   x = 37,705.24