Finding the Fourth Proportional to 462,879.72, 638,743.89 and 258,895.30

Step by Step Solution

1. Step 1: Write the proportion equation
   462,879.72 : 638,743.89 = 258,895.30 : x
2. Step 2: Convert to fraction form
   462,879.72/638,743.89 = 258,895.30/x
3. Step 3: Cross multiply
   462,879.72x = 638,743.89 × 258,895.30
4. Step 4: Simplify right side
   462,879.72x = 165,367,787,831.00
5. Step 5: Solve for x
   x = 165,367,787,831.00/462,879.72
6. Step 6: Final answer
   x = 357,258.66