Finding the Fourth Proportional to 17,178.27, 23,704.16 and 12,704.55

Step by Step Solution

1. Step 1: Write the proportion equation
   17,178.27 : 23,704.16 = 12,704.55 : x
2. Step 2: Convert to fraction form
   17,178.27/23,704.16 = 12,704.55/x
3. Step 3: Cross multiply
   17,178.27x = 23,704.16 × 12,704.55
4. Step 4: Simplify right side
   17,178.27x = 301,150,622.41
5. Step 5: Solve for x
   x = 301,150,622.41/17,178.27
6. Step 6: Final answer
   x = 17,530.91