Finding the Fourth Proportional to 78,076.76, 107,745.90 and 42,266.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,076.76 : 107,745.90 = 42,266.75 : x
2. Step 2: Convert to fraction form
   78,076.76/107,745.90 = 42,266.75/x
3. Step 3: Cross multiply
   78,076.76x = 107,745.90 × 42,266.75
4. Step 4: Simplify right side
   78,076.76x = 4,554,068,480.10
5. Step 5: Solve for x
   x = 4,554,068,480.10/78,076.76
6. Step 6: Final answer
   x = 58,328.10