Finding the Fourth Proportional to 9,571.86, 13,212.18 and 8,828.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,571.86 : 13,212.18 = 8,828.28 : x
2. Step 2: Convert to fraction form
   9,571.86/13,212.18 = 8,828.28/x
3. Step 3: Cross multiply
   9,571.86x = 13,212.18 × 8,828.28
4. Step 4: Simplify right side
   9,571.86x = 116,640,824.45
5. Step 5: Solve for x
   x = 116,640,824.45/9,571.86
6. Step 6: Final answer
   x = 12,185.81