Finding the Fourth Proportional to 9,158.20, 12,628.82 and 7,836.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.20 : 12,628.82 = 7,836.28 : x
2. Step 2: Convert to fraction form
   9,158.20/12,628.82 = 7,836.28/x
3. Step 3: Cross multiply
   9,158.20x = 12,628.82 × 7,836.28
4. Step 4: Simplify right side
   9,158.20x = 98,962,969.59
5. Step 5: Solve for x
   x = 98,962,969.59/9,158.20
6. Step 6: Final answer
   x = 10,805.94