Finding the Fourth Proportional to 9,648.54, 13,315.23 and 5,399.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,648.54 : 13,315.23 = 5,399.57 : x
2. Step 2: Convert to fraction form
   9,648.54/13,315.23 = 5,399.57/x
3. Step 3: Cross multiply
   9,648.54x = 13,315.23 × 5,399.57
4. Step 4: Simplify right side
   9,648.54x = 71,896,492.93
5. Step 5: Solve for x
   x = 71,896,492.93/9,648.54
6. Step 6: Final answer
   x = 7,451.54