Finding the Fourth Proportional to 76,768.88, 105,940.80 and 42,778.82

Step by Step Solution

1. Step 1: Write the proportion equation
   76,768.88 : 105,940.80 = 42,778.82 : x
2. Step 2: Convert to fraction form
   76,768.88/105,940.80 = 42,778.82/x
3. Step 3: Cross multiply
   76,768.88x = 105,940.80 × 42,778.82
4. Step 4: Simplify right side
   76,768.88x = 4,532,022,413.86
5. Step 5: Solve for x
   x = 4,532,022,413.86/76,768.88
6. Step 6: Final answer
   x = 59,034.63