Finding the Fourth Proportional to 11,391.26, 17,081.04 and 5,147.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,391.26 : 17,081.04 = 5,147.89 : x
2. Step 2: Convert to fraction form
   11,391.26/17,081.04 = 5,147.89/x
3. Step 3: Cross multiply
   11,391.26x = 17,081.04 × 5,147.89
4. Step 4: Simplify right side
   11,391.26x = 87,931,387.69
5. Step 5: Solve for x
   x = 87,931,387.69/11,391.26
6. Step 6: Final answer
   x = 7,719.20