Finding the Fourth Proportional to 11,367.47, 15,679.61 and 7,111.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,367.47 : 15,679.61 = 7,111.16 : x
2. Step 2: Convert to fraction form
   11,367.47/15,679.61 = 7,111.16/x
3. Step 3: Cross multiply
   11,367.47x = 15,679.61 × 7,111.16
4. Step 4: Simplify right side
   11,367.47x = 111,500,186.96
5. Step 5: Solve for x
   x = 111,500,186.96/11,367.47
6. Step 6: Final answer
   x = 9,808.71