Finding the Fourth Proportional to 13,591.82, 18,756.89 and 8,213.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,591.82 : 18,756.89 = 8,213.51 : x
2. Step 2: Convert to fraction form
   13,591.82/18,756.89 = 8,213.51/x
3. Step 3: Cross multiply
   13,591.82x = 18,756.89 × 8,213.51
4. Step 4: Simplify right side
   13,591.82x = 154,059,768.73
5. Step 5: Solve for x
   x = 154,059,768.73/13,591.82
6. Step 6: Final answer
   x = 11,334.75