Finding the Fourth Proportional to 8,591.91, 11,828.30 and 7,706.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,591.91 : 11,828.30 = 7,706.18 : x
2. Step 2: Convert to fraction form
   8,591.91/11,828.30 = 7,706.18/x
3. Step 3: Cross multiply
   8,591.91x = 11,828.30 × 7,706.18
4. Step 4: Simplify right side
   8,591.91x = 91,150,984.48
5. Step 5: Solve for x
   x = 91,150,984.48/8,591.91
6. Step 6: Final answer
   x = 10,608.93