Finding the Fourth Proportional to 9,351.12, 12,904.59 and 5,159.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,351.12 : 12,904.59 = 5,159.37 : x
2. Step 2: Convert to fraction form
   9,351.12/12,904.59 = 5,159.37/x
3. Step 3: Cross multiply
   9,351.12x = 12,904.59 × 5,159.37
4. Step 4: Simplify right side
   9,351.12x = 66,579,554.51
5. Step 5: Solve for x
   x = 66,579,554.51/9,351.12
6. Step 6: Final answer
   x = 7,119.96