Finding the Fourth Proportional to 8,083.80, 12,042.27 and 7,839.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,083.80 : 12,042.27 = 7,839.05 : x
2. Step 2: Convert to fraction form
   8,083.80/12,042.27 = 7,839.05/x
3. Step 3: Cross multiply
   8,083.80x = 12,042.27 × 7,839.05
4. Step 4: Simplify right side
   8,083.80x = 94,399,896.43
5. Step 5: Solve for x
   x = 94,399,896.43/8,083.80
6. Step 6: Final answer
   x = 11,677.66