Finding the Fourth Proportional to 76,945.54, 106,190.20 and 42,960.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,945.54 : 106,190.20 = 42,960.72 : x
2. Step 2: Convert to fraction form
   76,945.54/106,190.20 = 42,960.72/x
3. Step 3: Cross multiply
   76,945.54x = 106,190.20 × 42,960.72
4. Step 4: Simplify right side
   76,945.54x = 4,562,007,448.94
5. Step 5: Solve for x
   x = 4,562,007,448.94/76,945.54
6. Step 6: Final answer
   x = 59,288.78