Finding the Fourth Proportional to 12,147.87, 18,225 and 3,828.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,147.87 : 18,225 = 3,828.16 : x
2. Step 2: Convert to fraction form
   12,147.87/18,225 = 3,828.16/x
3. Step 3: Cross multiply
   12,147.87x = 18,225 × 3,828.16
4. Step 4: Simplify right side
   12,147.87x = 69,768,238.78
5. Step 5: Solve for x
   x = 69,768,238.78/12,147.87
6. Step 6: Final answer
   x = 5,743.25