Finding the Fourth Proportional to 9,994.44, 13,791.96 and 5,518.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,994.44 : 13,791.96 = 5,518.10 : x
2. Step 2: Convert to fraction form
   9,994.44/13,791.96 = 5,518.10/x
3. Step 3: Cross multiply
   9,994.44x = 13,791.96 × 5,518.10
4. Step 4: Simplify right side
   9,994.44x = 76,105,414.48
5. Step 5: Solve for x
   x = 76,105,414.48/9,994.44
6. Step 6: Final answer
   x = 7,614.78