Finding the Fourth Proportional to 12,791.72, 17,651.46 and 9,436.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791.72 : 17,651.46 = 9,436.36 : x
2. Step 2: Convert to fraction form
   12,791.72/17,651.46 = 9,436.36/x
3. Step 3: Cross multiply
   12,791.72x = 17,651.46 × 9,436.36
4. Step 4: Simplify right side
   12,791.72x = 166,565,531.09
5. Step 5: Solve for x
   x = 166,565,531.09/12,791.72
6. Step 6: Final answer
   x = 13,021.36