Finding the Fourth Proportional to 8,993.78, 12,410.52 and 5,456.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,993.78 : 12,410.52 = 5,456.78 : x
2. Step 2: Convert to fraction form
   8,993.78/12,410.52 = 5,456.78/x
3. Step 3: Cross multiply
   8,993.78x = 12,410.52 × 5,456.78
4. Step 4: Simplify right side
   8,993.78x = 67,721,477.33
5. Step 5: Solve for x
   x = 67,721,477.33/8,993.78
6. Step 6: Final answer
   x = 7,529.81