Finding the Fourth Proportional to 3,884.70, 5,357.72 and 2,389.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,884.70 : 5,357.72 = 2,389.94 : x
2. Step 2: Convert to fraction form
   3,884.70/5,357.72 = 2,389.94/x
3. Step 3: Cross multiply
   3,884.70x = 5,357.72 × 2,389.94
4. Step 4: Simplify right side
   3,884.70x = 12,804,629.34
5. Step 5: Solve for x
   x = 12,804,629.34/3,884.70
6. Step 6: Final answer
   x = 3,296.17