Finding the Fourth Proportional to 78,441.36, 108,249.91 and 42,631.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,441.36 : 108,249.91 = 42,631.37 : x
2. Step 2: Convert to fraction form
   78,441.36/108,249.91 = 42,631.37/x
3. Step 3: Cross multiply
   78,441.36x = 108,249.91 × 42,631.37
4. Step 4: Simplify right side
   78,441.36x = 4,614,841,723.79
5. Step 5: Solve for x
   x = 4,614,841,723.79/78,441.36
6. Step 6: Final answer
   x = 58,831.74