Finding the Fourth Proportional to 441,976.69, 609,930.17 and 258,322.15

Step by Step Solution

1. Step 1: Write the proportion equation
   441,976.69 : 609,930.17 = 258,322.15 : x
2. Step 2: Convert to fraction form
   441,976.69/609,930.17 = 258,322.15/x
3. Step 3: Cross multiply
   441,976.69x = 609,930.17 × 258,322.15
4. Step 4: Simplify right side
   441,976.69x = 157,558,472,864.27
5. Step 5: Solve for x
   x = 157,558,472,864.27/441,976.69
6. Step 6: Final answer
   x = 356,485.93