Finding the Fourth Proportional to 3,945.56, 5,446.86 and 2,618.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.56 : 5,446.86 = 2,618.60 : x
2. Step 2: Convert to fraction form
   3,945.56/5,446.86 = 2,618.60/x
3. Step 3: Cross multiply
   3,945.56x = 5,446.86 × 2,618.60
4. Step 4: Simplify right side
   3,945.56x = 14,263,147.60
5. Step 5: Solve for x
   x = 14,263,147.60/3,945.56
6. Step 6: Final answer
   x = 3,614.99