Finding the Fourth Proportional to 2,858.39, 3,945.94 and 2,150.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.39 : 3,945.94 = 2,150.51 : x
2. Step 2: Convert to fraction form
   2,858.39/3,945.94 = 2,150.51/x
3. Step 3: Cross multiply
   2,858.39x = 3,945.94 × 2,150.51
4. Step 4: Simplify right side
   2,858.39x = 8,485,758.32
5. Step 5: Solve for x
   x = 8,485,758.32/2,858.39
6. Step 6: Final answer
   x = 2,968.72