Finding the Fourth Proportional to 78,067.91, 107,733.78 and 42,257.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,067.91 : 107,733.78 = 42,257.81 : x
2. Step 2: Convert to fraction form
   78,067.91/107,733.78 = 42,257.81/x
3. Step 3: Cross multiply
   78,067.91x = 107,733.78 × 42,257.81
4. Step 4: Simplify right side
   78,067.91x = 4,552,593,605.82
5. Step 5: Solve for x
   x = 4,552,593,605.82/78,067.91
6. Step 6: Final answer
   x = 58,315.81