Finding the Fourth Proportional to 9,361.20, 12,919.20 and 5,383.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,361.20 : 12,919.20 = 5,383.04 : x
2. Step 2: Convert to fraction form
   9,361.20/12,919.20 = 5,383.04/x
3. Step 3: Cross multiply
   9,361.20x = 12,919.20 × 5,383.04
4. Step 4: Simplify right side
   9,361.20x = 69,544,570.37
5. Step 5: Solve for x
   x = 69,544,570.37/9,361.20
6. Step 6: Final answer
   x = 7,429.02