Finding the Fourth Proportional to 11,401.20, 17,100.72 and 3,609.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,401.20 : 17,100.72 = 3,609.36 : x
2. Step 2: Convert to fraction form
   11,401.20/17,100.72 = 3,609.36/x
3. Step 3: Cross multiply
   11,401.20x = 17,100.72 × 3,609.36
4. Step 4: Simplify right side
   11,401.20x = 61,722,654.74
5. Step 5: Solve for x
   x = 61,722,654.74/11,401.20
6. Step 6: Final answer
   x = 5,413.70