Finding the Fourth Proportional to 8,194.51, 12,209.31 and 8,112.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,194.51 : 12,209.31 = 8,112.57 : x
2. Step 2: Convert to fraction form
   8,194.51/12,209.31 = 8,112.57/x
3. Step 3: Cross multiply
   8,194.51x = 12,209.31 × 8,112.57
4. Step 4: Simplify right side
   8,194.51x = 99,048,882.03
5. Step 5: Solve for x
   x = 99,048,882.03/8,194.51
6. Step 6: Final answer
   x = 12,087.22