Finding the Fourth Proportional to 17,189.10, 25,780.41 and 8,418.42

Step by Step Solution

1. Step 1: Write the proportion equation
   17,189.10 : 25,780.41 = 8,418.42 : x
2. Step 2: Convert to fraction form
   17,189.10/25,780.41 = 8,418.42/x
3. Step 3: Cross multiply
   17,189.10x = 25,780.41 × 8,418.42
4. Step 4: Simplify right side
   17,189.10x = 217,030,319.15
5. Step 5: Solve for x
   x = 217,030,319.15/17,189.10
6. Step 6: Final answer
   x = 12,626.04