Finding the Fourth Proportional to 12,081.36, 18,121.82 and 4,964.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.36 : 18,121.82 = 4,964.09 : x
2. Step 2: Convert to fraction form
   12,081.36/18,121.82 = 4,964.09/x
3. Step 3: Cross multiply
   12,081.36x = 18,121.82 × 4,964.09
4. Step 4: Simplify right side
   12,081.36x = 89,958,275.32
5. Step 5: Solve for x
   x = 89,958,275.32/12,081.36
6. Step 6: Final answer
   x = 7,446.04