Finding the Third Proportional to 20,640 and 30,472

Step by Step Solution

1. Step 1: Write the proportion equation
   20,640 : 30,472 = 30,472 : x
2. Step 2: Convert to fraction form
   20,640/30,472 = 30,472/x
3. Step 3: Cross multiply
   20,640x = 30,472 × 30,472
4. Step 4: Simplify right side
   20,640x = 928,542,784
5. Step 5: Solve for x
   x = 928,542,784/20,640
6. Step 6: Final answer
   x = 44,987.54