Finding the Fourth Proportional to 13,257.41, 18,298.17 and 10,380.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,257.41 : 18,298.17 = 10,380.42 : x
2. Step 2: Convert to fraction form
   13,257.41/18,298.17 = 10,380.42/x
3. Step 3: Cross multiply
   13,257.41x = 18,298.17 × 10,380.42
4. Step 4: Simplify right side
   13,257.41x = 189,942,689.83
5. Step 5: Solve for x
   x = 189,942,689.83/13,257.41
6. Step 6: Final answer
   x = 14,327.29