Finding the Fourth Proportional to 12,791.39, 17,650.91 and 9,436.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791.39 : 17,650.91 = 9,436.06 : x
2. Step 2: Convert to fraction form
   12,791.39/17,650.91 = 9,436.06/x
3. Step 3: Cross multiply
   12,791.39x = 17,650.91 × 9,436.06
4. Step 4: Simplify right side
   12,791.39x = 166,555,091.47
5. Step 5: Solve for x
   x = 166,555,091.47/12,791.39
6. Step 6: Final answer
   x = 13,020.88