Finding the Fourth Proportional to 401,871.30, 603,498.15 and 284,367.30

Step by Step Solution

1. Step 1: Write the proportion equation
   401,871.30 : 603,498.15 = 284,367.30 : x
2. Step 2: Convert to fraction form
   401,871.30/603,498.15 = 284,367.30/x
3. Step 3: Cross multiply
   401,871.30x = 603,498.15 × 284,367.30
4. Step 4: Simplify right side
   401,871.30x = 171,615,139,470.50
5. Step 5: Solve for x
   x = 171,615,139,470.50/401,871.30
6. Step 6: Final answer
   x = 427,040.05