Finding the Fourth Proportional to 76,868.07, 106,078.52 and 42,878.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,868.07 : 106,078.52 = 42,878.78 : x
2. Step 2: Convert to fraction form
   76,868.07/106,078.52 = 42,878.78/x
3. Step 3: Cross multiply
   76,868.07x = 106,078.52 × 42,878.78
4. Step 4: Simplify right side
   76,868.07x = 4,548,517,307.41
5. Step 5: Solve for x
   x = 4,548,517,307.41/76,868.07
6. Step 6: Final answer
   x = 59,173.04