Finding the Fourth Proportional to 11,105.24, 15,317.71 and 7,131.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,105.24 : 15,317.71 = 7,131.18 : x
2. Step 2: Convert to fraction form
   11,105.24/15,317.71 = 7,131.18/x
3. Step 3: Cross multiply
   11,105.24x = 15,317.71 × 7,131.18
4. Step 4: Simplify right side
   11,105.24x = 109,233,347.20
5. Step 5: Solve for x
   x = 109,233,347.20/11,105.24
6. Step 6: Final answer
   x = 9,836.20