Finding the Fourth Proportional to 8,856.72, 12,218.96 and 5,078.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856.72 : 12,218.96 = 5,078.54 : x
2. Step 2: Convert to fraction form
   8,856.72/12,218.96 = 5,078.54/x
3. Step 3: Cross multiply
   8,856.72x = 12,218.96 × 5,078.54
4. Step 4: Simplify right side
   8,856.72x = 62,054,390.63
5. Step 5: Solve for x
   x = 62,054,390.63/8,856.72
6. Step 6: Final answer
   x = 7,006.48