Finding the Fourth Proportional to 9,993.76, 13,791.33 and 5,517.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,993.76 : 13,791.33 = 5,517.56 : x
2. Step 2: Convert to fraction form
   9,993.76/13,791.33 = 5,517.56/x
3. Step 3: Cross multiply
   9,993.76x = 13,791.33 × 5,517.56
4. Step 4: Simplify right side
   9,993.76x = 76,094,525.23
5. Step 5: Solve for x
   x = 76,094,525.23/9,993.76
6. Step 6: Final answer
   x = 7,614.21