Finding the Fourth Proportional to 9,021.06, 12,382.79 and 8,004.11

Step by Step Solution

1. Step 1: Write the proportion equation
   9,021.06 : 12,382.79 = 8,004.11 : x
2. Step 2: Convert to fraction form
   9,021.06/12,382.79 = 8,004.11/x
3. Step 3: Cross multiply
   9,021.06x = 12,382.79 × 8,004.11
4. Step 4: Simplify right side
   9,021.06x = 99,113,111.33
5. Step 5: Solve for x
   x = 99,113,111.33/9,021.06
6. Step 6: Final answer
   x = 10,986.86