Finding the Fourth Proportional to 12,031.82, 18,007.07 and 8,591.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,031.82 : 18,007.07 = 8,591.39 : x
2. Step 2: Convert to fraction form
   12,031.82/18,007.07 = 8,591.39/x
3. Step 3: Cross multiply
   12,031.82x = 18,007.07 × 8,591.39
4. Step 4: Simplify right side
   12,031.82x = 154,705,628.14
5. Step 5: Solve for x
   x = 154,705,628.14/12,031.82
6. Step 6: Final answer
   x = 12,858.05