Finding the Fourth Proportional to 17,067.72, 25,692.15 and 12,171.24

Step by Step Solution

1. Step 1: Write the proportion equation
   17,067.72 : 25,692.15 = 12,171.24 : x
2. Step 2: Convert to fraction form
   17,067.72/25,692.15 = 12,171.24/x
3. Step 3: Cross multiply
   17,067.72x = 25,692.15 × 12,171.24
4. Step 4: Simplify right side
   17,067.72x = 312,705,323.77
5. Step 5: Solve for x
   x = 312,705,323.77/17,067.72
6. Step 6: Final answer
   x = 18,321.45