Finding the Fourth Proportional to 9,144.72, 13,722.35 and 3,879.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.72 : 13,722.35 = 3,879.32 : x
2. Step 2: Convert to fraction form
   9,144.72/13,722.35 = 3,879.32/x
3. Step 3: Cross multiply
   9,144.72x = 13,722.35 × 3,879.32
4. Step 4: Simplify right side
   9,144.72x = 53,233,298.79
5. Step 5: Solve for x
   x = 53,233,298.79/9,144.72
6. Step 6: Final answer
   x = 5,821.21