Finding the Third Proportional to 217,816 and 471,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,816 : 471,831.50 = 471,831.50 : x
2. Step 2: Convert to fraction form
   217,816/471,831.50 = 471,831.50/x
3. Step 3: Cross multiply
   217,816x = 471,831.50 × 471,831.50
4. Step 4: Simplify right side
   217,816x = 222,624,964,392.25
5. Step 5: Solve for x
   x = 222,624,964,392.25/217,816
6. Step 6: Final answer
   x = 1,022,078.10