Finding the Fourth Proportional to 9,361.56, 12,919.50 and 5,383.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,361.56 : 12,919.50 = 5,383.80 : x
2. Step 2: Convert to fraction form
   9,361.56/12,919.50 = 5,383.80/x
3. Step 3: Cross multiply
   9,361.56x = 12,919.50 × 5,383.80
4. Step 4: Simplify right side
   9,361.56x = 69,556,004.10
5. Step 5: Solve for x
   x = 69,556,004.10/9,361.56
6. Step 6: Final answer
   x = 7,429.96