Finding the Fourth Proportional to 7,078.72, 9,769.60 and 4,285.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.72 : 9,769.60 = 4,285.12 : x
2. Step 2: Convert to fraction form
   7,078.72/9,769.60 = 4,285.12/x
3. Step 3: Cross multiply
   7,078.72x = 9,769.60 × 4,285.12
4. Step 4: Simplify right side
   7,078.72x = 41,863,908.35
5. Step 5: Solve for x
   x = 41,863,908.35/7,078.72
6. Step 6: Final answer
   x = 5,914.05