Finding the Fourth Proportional to 9,268.21, 13,871.94 and 8,404.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,268.21 : 13,871.94 = 8,404.75 : x
2. Step 2: Convert to fraction form
   9,268.21/13,871.94 = 8,404.75/x
3. Step 3: Cross multiply
   9,268.21x = 13,871.94 × 8,404.75
4. Step 4: Simplify right side
   9,268.21x = 116,590,187.72
5. Step 5: Solve for x
   x = 116,590,187.72/9,268.21
6. Step 6: Final answer
   x = 12,579.58