Finding the Fourth Proportional to 9,648.79, 13,314.54 and 5,399.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,648.79 : 13,314.54 = 5,399.63 : x
2. Step 2: Convert to fraction form
   9,648.79/13,314.54 = 5,399.63/x
3. Step 3: Cross multiply
   9,648.79x = 13,314.54 × 5,399.63
4. Step 4: Simplify right side
   9,648.79x = 71,893,589.62
5. Step 5: Solve for x
   x = 71,893,589.62/9,648.79
6. Step 6: Final answer
   x = 7,451.05