Finding the Fourth Proportional to 419,771.20, 579,297.78 and 238,479.82

Step by Step Solution

1. Step 1: Write the proportion equation
   419,771.20 : 579,297.78 = 238,479.82 : x
2. Step 2: Convert to fraction form
   419,771.20/579,297.78 = 238,479.82/x
3. Step 3: Cross multiply
   419,771.20x = 579,297.78 × 238,479.82
4. Step 4: Simplify right side
   419,771.20x = 138,150,830,300.80
5. Step 5: Solve for x
   x = 138,150,830,300.80/419,771.20
6. Step 6: Final answer
   x = 329,109.83