Finding the Fourth Proportional to 12,478.29, 18,717.39 and 5,081.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.29 : 18,717.39 = 5,081.10 : x
2. Step 2: Convert to fraction form
   12,478.29/18,717.39 = 5,081.10/x
3. Step 3: Cross multiply
   12,478.29x = 18,717.39 × 5,081.10
4. Step 4: Simplify right side
   12,478.29x = 95,104,930.33
5. Step 5: Solve for x
   x = 95,104,930.33/12,478.29
6. Step 6: Final answer
   x = 7,621.63