Finding the Fourth Proportional to 9,026.20, 12,459.57 and 8,080.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,026.20 : 12,459.57 = 8,080.28 : x
2. Step 2: Convert to fraction form
   9,026.20/12,459.57 = 8,080.28/x
3. Step 3: Cross multiply
   9,026.20x = 12,459.57 × 8,080.28
4. Step 4: Simplify right side
   9,026.20x = 100,676,751.98
5. Step 5: Solve for x
   x = 100,676,751.98/9,026.20
6. Step 6: Final answer
   x = 11,153.84