Finding the Fourth Proportional to 263,498.94, 363,628.71 and 142,639.83

Step by Step Solution

1. Step 1: Write the proportion equation
   263,498.94 : 363,628.71 = 142,639.83 : x
2. Step 2: Convert to fraction form
   263,498.94/363,628.71 = 142,639.83/x
3. Step 3: Cross multiply
   263,498.94x = 363,628.71 × 142,639.83
4. Step 4: Simplify right side
   263,498.94x = 51,867,937,377.52
5. Step 5: Solve for x
   x = 51,867,937,377.52/263,498.94
6. Step 6: Final answer
   x = 196,843.06