Finding the Fourth Proportional to 419,362.56, 578,766.60 and 258,185.52

Step by Step Solution

1. Step 1: Write the proportion equation
   419,362.56 : 578,766.60 = 258,185.52 : x
2. Step 2: Convert to fraction form
   419,362.56/578,766.60 = 258,185.52/x
3. Step 3: Cross multiply
   419,362.56x = 578,766.60 × 258,185.52
4. Step 4: Simplify right side
   419,362.56x = 149,429,155,579.63
5. Step 5: Solve for x
   x = 149,429,155,579.63/419,362.56
6. Step 6: Final answer
   x = 356,324.50