Finding the Fourth Proportional to 9,790.86, 13,513.59 and 8,216.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,790.86 : 13,513.59 = 8,216.22 : x
2. Step 2: Convert to fraction form
   9,790.86/13,513.59 = 8,216.22/x
3. Step 3: Cross multiply
   9,790.86x = 13,513.59 × 8,216.22
4. Step 4: Simplify right side
   9,790.86x = 111,030,628.43
5. Step 5: Solve for x
   x = 111,030,628.43/9,790.86
6. Step 6: Final answer
   x = 11,340.23