Finding the Fourth Proportional to 13,481.67, 18,599.31 and 8,174.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,481.67 : 18,599.31 = 8,174.55 : x
2. Step 2: Convert to fraction form
   13,481.67/18,599.31 = 8,174.55/x
3. Step 3: Cross multiply
   13,481.67x = 18,599.31 × 8,174.55
4. Step 4: Simplify right side
   13,481.67x = 152,040,989.56
5. Step 5: Solve for x
   x = 152,040,989.56/13,481.67
6. Step 6: Final answer
   x = 11,277.61