Finding the Third Proportional to 20,408.50 and 30,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,408.50 : 30,920.50 = 30,920.50 : x
2. Step 2: Convert to fraction form
   20,408.50/30,920.50 = 30,920.50/x
3. Step 3: Cross multiply
   20,408.50x = 30,920.50 × 30,920.50
4. Step 4: Simplify right side
   20,408.50x = 956,077,320.25
5. Step 5: Solve for x
   x = 956,077,320.25/20,408.50
6. Step 6: Final answer
   x = 46,847.02