Finding the Third Proportional to 9,415 and 20,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415 : 20,469.50 = 20,469.50 : x
2. Step 2: Convert to fraction form
   9,415/20,469.50 = 20,469.50/x
3. Step 3: Cross multiply
   9,415x = 20,469.50 × 20,469.50
4. Step 4: Simplify right side
   9,415x = 419,000,430.25
5. Step 5: Solve for x
   x = 419,000,430.25/9,415
6. Step 6: Final answer
   x = 44,503.50