Finding the Fourth Proportional to 76,867.57, 106,077.83 and 42,878.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,867.57 : 106,077.83 = 42,878.28 : x
2. Step 2: Convert to fraction form
   76,867.57/106,077.83 = 42,878.28/x
3. Step 3: Cross multiply
   76,867.57x = 106,077.83 × 42,878.28
4. Step 4: Simplify right side
   76,867.57x = 4,548,434,682.14
5. Step 5: Solve for x
   x = 4,548,434,682.14/76,867.57
6. Step 6: Final answer
   x = 59,172.35