Finding the Fourth Proportional to 10,896.60, 16,339.38 and 5,057.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,896.60 : 16,339.38 = 5,057.28 : x
2. Step 2: Convert to fraction form
   10,896.60/16,339.38 = 5,057.28/x
3. Step 3: Cross multiply
   10,896.60x = 16,339.38 × 5,057.28
4. Step 4: Simplify right side
   10,896.60x = 82,632,819.69
5. Step 5: Solve for x
   x = 82,632,819.69/10,896.60
6. Step 6: Final answer
   x = 7,583.36