Finding the Fourth Proportional to 12,621.46, 18,935.60 and 3,856.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.46 : 18,935.60 = 3,856.14 : x
2. Step 2: Convert to fraction form
   12,621.46/18,935.60 = 3,856.14/x
3. Step 3: Cross multiply
   12,621.46x = 18,935.60 × 3,856.14
4. Step 4: Simplify right side
   12,621.46x = 73,018,314.83
5. Step 5: Solve for x
   x = 73,018,314.83/12,621.46
6. Step 6: Final answer
   x = 5,785.25