Finding the Fourth Proportional to 12,291.24, 18,439.59 and 3,525.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.24 : 18,439.59 = 3,525.48 : x
2. Step 2: Convert to fraction form
   12,291.24/18,439.59 = 3,525.48/x
3. Step 3: Cross multiply
   12,291.24x = 18,439.59 × 3,525.48
4. Step 4: Simplify right side
   12,291.24x = 65,008,405.75
5. Step 5: Solve for x
   x = 65,008,405.75/12,291.24
6. Step 6: Final answer
   x = 5,289.00