Finding the Fourth Proportional to 441,796.69, 609,681.77 and 258,142.15

Step by Step Solution

1. Step 1: Write the proportion equation
   441,796.69 : 609,681.77 = 258,142.15 : x
2. Step 2: Convert to fraction form
   441,796.69/609,681.77 = 258,142.15/x
3. Step 3: Cross multiply
   441,796.69x = 609,681.77 × 258,142.15
4. Step 4: Simplify right side
   441,796.69x = 157,384,562,923.61
5. Step 5: Solve for x
   x = 157,384,562,923.61/441,796.69
6. Step 6: Final answer
   x = 356,237.53