Finding the Fourth Proportional to 17,667.12, 24,391.52 and 13,418.40

Step by Step Solution

1. Step 1: Write the proportion equation
   17,667.12 : 24,391.52 = 13,418.40 : x
2. Step 2: Convert to fraction form
   17,667.12/24,391.52 = 13,418.40/x
3. Step 3: Cross multiply
   17,667.12x = 24,391.52 × 13,418.40
4. Step 4: Simplify right side
   17,667.12x = 327,295,171.97
5. Step 5: Solve for x
   x = 327,295,171.97/17,667.12
6. Step 6: Final answer
   x = 18,525.67