Finding the Fourth Proportional to 12,291.09, 18,432.69 and 3,969.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.09 : 18,432.69 = 3,969.33 : x
2. Step 2: Convert to fraction form
   12,291.09/18,432.69 = 3,969.33/x
3. Step 3: Cross multiply
   12,291.09x = 18,432.69 × 3,969.33
4. Step 4: Simplify right side
   12,291.09x = 73,165,429.40
5. Step 5: Solve for x
   x = 73,165,429.40/12,291.09
6. Step 6: Final answer
   x = 5,952.72