Finding the Fourth Proportional to 9,994.56, 13,792.60 and 5,518.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,994.56 : 13,792.60 = 5,518.31 : x
2. Step 2: Convert to fraction form
   9,994.56/13,792.60 = 5,518.31/x
3. Step 3: Cross multiply
   9,994.56x = 13,792.60 × 5,518.31
4. Step 4: Simplify right side
   9,994.56x = 76,111,873.54
5. Step 5: Solve for x
   x = 76,111,873.54/9,994.56
6. Step 6: Final answer
   x = 7,615.33