Finding the Fourth Proportional to 13,254.96, 19,870.56 and 5,458.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,254.96 : 19,870.56 = 5,458.80 : x
2. Step 2: Convert to fraction form
   13,254.96/19,870.56 = 5,458.80/x
3. Step 3: Cross multiply
   13,254.96x = 19,870.56 × 5,458.80
4. Step 4: Simplify right side
   13,254.96x = 108,469,412.93
5. Step 5: Solve for x
   x = 108,469,412.93/13,254.96
6. Step 6: Final answer
   x = 8,183.31