Finding the Fourth Proportional to 9,894.36, 13,654.23 and 5,357.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,894.36 : 13,654.23 = 5,357.09 : x
2. Step 2: Convert to fraction form
   9,894.36/13,654.23 = 5,357.09/x
3. Step 3: Cross multiply
   9,894.36x = 13,654.23 × 5,357.09
4. Step 4: Simplify right side
   9,894.36x = 73,146,870.72
5. Step 5: Solve for x
   x = 73,146,870.72/9,894.36
6. Step 6: Final answer
   x = 7,392.79