Finding the Fourth Proportional to 9,318.23, 12,854.63 and 5,538.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,318.23 : 12,854.63 = 5,538.72 : x
2. Step 2: Convert to fraction form
   9,318.23/12,854.63 = 5,538.72/x
3. Step 3: Cross multiply
   9,318.23x = 12,854.63 × 5,538.72
4. Step 4: Simplify right side
   9,318.23x = 71,198,196.27
5. Step 5: Solve for x
   x = 71,198,196.27/9,318.23
6. Step 6: Final answer
   x = 7,640.74