Finding the Fourth Proportional to 13,321.27, 18,382.56 and 7,352.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.27 : 18,382.56 = 7,352.78 : x
2. Step 2: Convert to fraction form
   13,321.27/18,382.56 = 7,352.78/x
3. Step 3: Cross multiply
   13,321.27x = 18,382.56 × 7,352.78
4. Step 4: Simplify right side
   13,321.27x = 135,162,919.52
5. Step 5: Solve for x
   x = 135,162,919.52/13,321.27
6. Step 6: Final answer
   x = 10,146.40