Finding the Fourth Proportional to 17,272.64, 23,847.72 and 13,286.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,272.64 : 23,847.72 = 13,286.72 : x
2. Step 2: Convert to fraction form
   17,272.64/23,847.72 = 13,286.72/x
3. Step 3: Cross multiply
   17,272.64x = 23,847.72 × 13,286.72
4. Step 4: Simplify right side
   17,272.64x = 316,857,978.28
5. Step 5: Solve for x
   x = 316,857,978.28/17,272.64
6. Step 6: Final answer
   x = 18,344.50