Finding the Fourth Proportional to 17,540.82, 26,414.46 and 12,644.91

Step by Step Solution

1. Step 1: Write the proportion equation
   17,540.82 : 26,414.46 = 12,644.91 : x
2. Step 2: Convert to fraction form
   17,540.82/26,414.46 = 12,644.91/x
3. Step 3: Cross multiply
   17,540.82x = 26,414.46 × 12,644.91
4. Step 4: Simplify right side
   17,540.82x = 334,008,469.40
5. Step 5: Solve for x
   x = 334,008,469.40/17,540.82
6. Step 6: Final answer
   x = 19,041.78