Finding the Fourth Proportional to 9,159.99, 13,729.55 and 5,454.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,159.99 : 13,729.55 = 5,454.39 : x
2. Step 2: Convert to fraction form
   9,159.99/13,729.55 = 5,454.39/x
3. Step 3: Cross multiply
   9,159.99x = 13,729.55 × 5,454.39
4. Step 4: Simplify right side
   9,159.99x = 74,886,297.89
5. Step 5: Solve for x
   x = 74,886,297.89/9,159.99
6. Step 6: Final answer
   x = 8,175.37