Finding the Fourth Proportional to 12,791.96, 17,661.61 and 8,013.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791.96 : 17,661.61 = 8,013.88 : x
2. Step 2: Convert to fraction form
   12,791.96/17,661.61 = 8,013.88/x
3. Step 3: Cross multiply
   12,791.96x = 17,661.61 × 8,013.88
4. Step 4: Simplify right side
   12,791.96x = 141,538,023.15
5. Step 5: Solve for x
   x = 141,538,023.15/12,791.96
6. Step 6: Final answer
   x = 11,064.61