Finding the Fourth Proportional to 11,105.12, 15,322.56 and 6,629.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,105.12 : 15,322.56 = 6,629.60 : x
2. Step 2: Convert to fraction form
   11,105.12/15,322.56 = 6,629.60/x
3. Step 3: Cross multiply
   11,105.12x = 15,322.56 × 6,629.60
4. Step 4: Simplify right side
   11,105.12x = 101,582,443.78
5. Step 5: Solve for x
   x = 101,582,443.78/11,105.12
6. Step 6: Final answer
   x = 9,147.35