Finding the Fourth Proportional to 11,405.72, 17,103.52 and 5,165.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,405.72 : 17,103.52 = 5,165.48 : x
2. Step 2: Convert to fraction form
   11,405.72/17,103.52 = 5,165.48/x
3. Step 3: Cross multiply
   11,405.72x = 17,103.52 × 5,165.48
4. Step 4: Simplify right side
   11,405.72x = 88,347,890.49
5. Step 5: Solve for x
   x = 88,347,890.49/11,405.72
6. Step 6: Final answer
   x = 7,745.93