Finding the Fourth Proportional to 8,684.22, 13,080.43 and 8,075.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,684.22 : 13,080.43 = 8,075.91 : x
2. Step 2: Convert to fraction form
   8,684.22/13,080.43 = 8,075.91/x
3. Step 3: Cross multiply
   8,684.22x = 13,080.43 × 8,075.91
4. Step 4: Simplify right side
   8,684.22x = 105,636,355.25
5. Step 5: Solve for x
   x = 105,636,355.25/8,684.22
6. Step 6: Final answer
   x = 12,164.17