Finding the Fourth Proportional to 404,406.72, 605,365.92 and 263,862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   404,406.72 : 605,365.92 = 263,862.72 : x
2. Step 2: Convert to fraction form
   404,406.72/605,365.92 = 263,862.72/x
3. Step 3: Cross multiply
   404,406.72x = 605,365.92 × 263,862.72
4. Step 4: Simplify right side
   404,406.72x = 159,733,498,246.50
5. Step 5: Solve for x
   x = 159,733,498,246.50/404,406.72
6. Step 6: Final answer
   x = 394,982.30