Finding the Fourth Proportional to 9,131.09, 13,630.57 and 8,023.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.09 : 13,630.57 = 8,023.91 : x
2. Step 2: Convert to fraction form
   9,131.09/13,630.57 = 8,023.91/x
3. Step 3: Cross multiply
   9,131.09x = 13,630.57 × 8,023.91
4. Step 4: Simplify right side
   9,131.09x = 109,370,466.93
5. Step 5: Solve for x
   x = 109,370,466.93/9,131.09
6. Step 6: Final answer
   x = 11,977.81