Finding the Fourth Proportional to 8,906.63, 12,291.35 and 5,768.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,906.63 : 12,291.35 = 5,768.28 : x
2. Step 2: Convert to fraction form
   8,906.63/12,291.35 = 5,768.28/x
3. Step 3: Cross multiply
   8,906.63x = 12,291.35 × 5,768.28
4. Step 4: Simplify right side
   8,906.63x = 70,899,919.54
5. Step 5: Solve for x
   x = 70,899,919.54/8,906.63
6. Step 6: Final answer
   x = 7,960.36