Finding the Fourth Proportional to 9,279.33, 13,919.78 and 3,039.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.33 : 13,919.78 = 3,039.21 : x
2. Step 2: Convert to fraction form
   9,279.33/13,919.78 = 3,039.21/x
3. Step 3: Cross multiply
   9,279.33x = 13,919.78 × 3,039.21
4. Step 4: Simplify right side
   9,279.33x = 42,305,119.38
5. Step 5: Solve for x
   x = 42,305,119.38/9,279.33
6. Step 6: Final answer
   x = 4,559.07