Finding the Fourth Proportional to 9,609.94, 13,261.72 and 5,418.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,609.94 : 13,261.72 = 5,418.18 : x
2. Step 2: Convert to fraction form
   9,609.94/13,261.72 = 5,418.18/x
3. Step 3: Cross multiply
   9,609.94x = 13,261.72 × 5,418.18
4. Step 4: Simplify right side
   9,609.94x = 71,854,386.07
5. Step 5: Solve for x
   x = 71,854,386.07/9,609.94
6. Step 6: Final answer
   x = 7,477.09