Finding the Fourth Proportional to 13,314.96, 19,960.56 and 5,518.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,314.96 : 19,960.56 = 5,518.80 : x
2. Step 2: Convert to fraction form
   13,314.96/19,960.56 = 5,518.80/x
3. Step 3: Cross multiply
   13,314.96x = 19,960.56 × 5,518.80
4. Step 4: Simplify right side
   13,314.96x = 110,158,338.53
5. Step 5: Solve for x
   x = 110,158,338.53/13,314.96
6. Step 6: Final answer
   x = 8,273.28