Finding the Fourth Proportional to 10,976.99, 16,453.33 and 5,418.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,976.99 : 16,453.33 = 5,418.56 : x
2. Step 2: Convert to fraction form
   10,976.99/16,453.33 = 5,418.56/x
3. Step 3: Cross multiply
   10,976.99x = 16,453.33 × 5,418.56
4. Step 4: Simplify right side
   10,976.99x = 89,153,383.39
5. Step 5: Solve for x
   x = 89,153,383.39/10,976.99
6. Step 6: Final answer
   x = 8,121.85