Finding the Fourth Proportional to 11,078.21, 16,620.56 and 4,153.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,078.21 : 16,620.56 = 4,153.25 : x
2. Step 2: Convert to fraction form
   11,078.21/16,620.56 = 4,153.25/x
3. Step 3: Cross multiply
   11,078.21x = 16,620.56 × 4,153.25
4. Step 4: Simplify right side
   11,078.21x = 69,029,320.05
5. Step 5: Solve for x
   x = 69,029,320.05/11,078.21
6. Step 6: Final answer
   x = 6,231.09