Finding the Third Proportional to 20,434.50 and 30,831.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,434.50 : 30,831.75 = 30,831.75 : x
2. Step 2: Convert to fraction form
   20,434.50/30,831.75 = 30,831.75/x
3. Step 3: Cross multiply
   20,434.50x = 30,831.75 × 30,831.75
4. Step 4: Simplify right side
   20,434.50x = 950,596,808.06
5. Step 5: Solve for x
   x = 950,596,808.06/20,434.50
6. Step 6: Final answer
   x = 46,519.21