Finding the Fourth Proportional to 8,916.86, 13,368.78 and 5,456.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,916.86 : 13,368.78 = 5,456.54 : x
2. Step 2: Convert to fraction form
   8,916.86/13,368.78 = 5,456.54/x
3. Step 3: Cross multiply
   8,916.86x = 13,368.78 × 5,456.54
4. Step 4: Simplify right side
   8,916.86x = 72,947,282.82
5. Step 5: Solve for x
   x = 72,947,282.82/8,916.86
6. Step 6: Final answer
   x = 8,180.83