Finding the Fourth Proportional to 11,836.88, 16,339.57 and 7,120.26

Step by Step Solution

1. Step 1: Write the proportion equation
   11,836.88 : 16,339.57 = 7,120.26 : x
2. Step 2: Convert to fraction form
   11,836.88/16,339.57 = 7,120.26/x
3. Step 3: Cross multiply
   11,836.88x = 16,339.57 × 7,120.26
4. Step 4: Simplify right side
   11,836.88x = 116,341,986.69
5. Step 5: Solve for x
   x = 116,341,986.69/11,836.88
6. Step 6: Final answer
   x = 9,828.77