Finding the Fourth Proportional to 7,078.56, 9,768.52 and 3,891.99

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.56 : 9,768.52 = 3,891.99 : x
2. Step 2: Convert to fraction form
   7,078.56/9,768.52 = 3,891.99/x
3. Step 3: Cross multiply
   7,078.56x = 9,768.52 × 3,891.99
4. Step 4: Simplify right side
   7,078.56x = 38,019,015.39
5. Step 5: Solve for x
   x = 38,019,015.39/7,078.56
6. Step 6: Final answer
   x = 5,371.01