Finding the Fourth Proportional to 12,621.82, 18,933.72 and 3,856.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.82 : 18,933.72 = 3,856.82 : x
2. Step 2: Convert to fraction form
   12,621.82/18,933.72 = 3,856.82/x
3. Step 3: Cross multiply
   12,621.82x = 18,933.72 × 3,856.82
4. Step 4: Simplify right side
   12,621.82x = 73,023,949.97
5. Step 5: Solve for x
   x = 73,023,949.97/12,621.82
6. Step 6: Final answer
   x = 5,785.53