Finding the Fourth Proportional to 17,345.55, 25,993.72 and 12,676.31

Step by Step Solution

1. Step 1: Write the proportion equation
   17,345.55 : 25,993.72 = 12,676.31 : x
2. Step 2: Convert to fraction form
   17,345.55/25,993.72 = 12,676.31/x
3. Step 3: Cross multiply
   17,345.55x = 25,993.72 × 12,676.31
4. Step 4: Simplify right side
   17,345.55x = 329,504,452.77
5. Step 5: Solve for x
   x = 329,504,452.77/17,345.55
6. Step 6: Final answer
   x = 18,996.48