Finding the Fourth Proportional to 8,485.68, 12,716.16 and 7,443.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.68 : 12,716.16 = 7,443.12 : x
2. Step 2: Convert to fraction form
   8,485.68/12,716.16 = 7,443.12/x
3. Step 3: Cross multiply
   8,485.68x = 12,716.16 × 7,443.12
4. Step 4: Simplify right side
   8,485.68x = 94,647,904.82
5. Step 5: Solve for x
   x = 94,647,904.82/8,485.68
6. Step 6: Final answer
   x = 11,153.84