Finding the Fourth Proportional to 419,123.82, 577,289.03 and 322,142.21

Step by Step Solution

1. Step 1: Write the proportion equation
   419,123.82 : 577,289.03 = 322,142.21 : x
2. Step 2: Convert to fraction form
   419,123.82/577,289.03 = 322,142.21/x
3. Step 3: Cross multiply
   419,123.82x = 577,289.03 × 322,142.21
4. Step 4: Simplify right side
   419,123.82x = 185,969,164,847.89
5. Step 5: Solve for x
   x = 185,969,164,847.89/419,123.82
6. Step 6: Final answer
   x = 443,709.37