Finding the Fourth Proportional to 13,379.37, 18,466.55 and 8,903.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,379.37 : 18,466.55 = 8,903.31 : x
2. Step 2: Convert to fraction form
   13,379.37/18,466.55 = 8,903.31/x
3. Step 3: Cross multiply
   13,379.37x = 18,466.55 × 8,903.31
4. Step 4: Simplify right side
   13,379.37x = 164,413,419.28
5. Step 5: Solve for x
   x = 164,413,419.28/13,379.37
6. Step 6: Final answer
   x = 12,288.58