Finding the Fourth Proportional to 78,076.62, 107,745.71 and 42,266.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,076.62 : 107,745.71 = 42,266.60 : x
2. Step 2: Convert to fraction form
   78,076.62/107,745.71 = 42,266.60/x
3. Step 3: Cross multiply
   78,076.62x = 107,745.71 × 42,266.60
4. Step 4: Simplify right side
   78,076.62x = 4,554,044,761.54
5. Step 5: Solve for x
   x = 4,554,044,761.54/78,076.62
6. Step 6: Final answer
   x = 58,327.90