Finding the Fourth Proportional to 9,993.88, 13,791.49 and 5,517.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,993.88 : 13,791.49 = 5,517.91 : x
2. Step 2: Convert to fraction form
   9,993.88/13,791.49 = 5,517.91/x
3. Step 3: Cross multiply
   9,993.88x = 13,791.49 × 5,517.91
4. Step 4: Simplify right side
   9,993.88x = 76,100,200.59
5. Step 5: Solve for x
   x = 76,100,200.59/9,993.88
6. Step 6: Final answer
   x = 7,614.68