Finding the Fourth Proportional to 11,404.05, 17,109.20 and 5,485.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,404.05 : 17,109.20 = 5,485.89 : x
2. Step 2: Convert to fraction form
   11,404.05/17,109.20 = 5,485.89/x
3. Step 3: Cross multiply
   11,404.05x = 17,109.20 × 5,485.89
4. Step 4: Simplify right side
   11,404.05x = 93,859,170.82
5. Step 5: Solve for x
   x = 93,859,170.82/11,404.05
6. Step 6: Final answer
   x = 8,230.34