Finding the Fourth Proportional to 12,291.24, 18,438.69 and 3,969.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.24 : 18,438.69 = 3,969.71 : x
2. Step 2: Convert to fraction form
   12,291.24/18,438.69 = 3,969.71/x
3. Step 3: Cross multiply
   12,291.24x = 18,438.69 × 3,969.71
4. Step 4: Simplify right side
   12,291.24x = 73,196,221.59
5. Step 5: Solve for x
   x = 73,196,221.59/12,291.24
6. Step 6: Final answer
   x = 5,955.15