Finding the Fourth Proportional to 17,667.26, 26,443.20 and 12,986.02

Step by Step Solution

1. Step 1: Write the proportion equation
   17,667.26 : 26,443.20 = 12,986.02 : x
2. Step 2: Convert to fraction form
   17,667.26/26,443.20 = 12,986.02/x
3. Step 3: Cross multiply
   17,667.26x = 26,443.20 × 12,986.02
4. Step 4: Simplify right side
   17,667.26x = 343,391,924.06
5. Step 5: Solve for x
   x = 343,391,924.06/17,667.26
6. Step 6: Final answer
   x = 19,436.63