Finding the Fourth Proportional to 12,481.76, 18,722.71 and 5,086.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,481.76 : 18,722.71 = 5,086.30 : x
2. Step 2: Convert to fraction form
   12,481.76/18,722.71 = 5,086.30/x
3. Step 3: Cross multiply
   12,481.76x = 18,722.71 × 5,086.30
4. Step 4: Simplify right side
   12,481.76x = 95,229,319.87
5. Step 5: Solve for x
   x = 95,229,319.87/12,481.76
6. Step 6: Final answer
   x = 7,629.48