Finding the Fourth Proportional to 11,805, 16,290.78 and 7,028.22

Step by Step Solution

1. Step 1: Write the proportion equation
   11,805 : 16,290.78 = 7,028.22 : x
2. Step 2: Convert to fraction form
   11,805/16,290.78 = 7,028.22/x
3. Step 3: Cross multiply
   11,805x = 16,290.78 × 7,028.22
4. Step 4: Simplify right side
   11,805x = 114,495,185.81
5. Step 5: Solve for x
   x = 114,495,185.81/11,805
6. Step 6: Final answer
   x = 9,698.87