Finding the Fourth Proportional to 2,588.44, 3,881.72 and 856.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,588.44 : 3,881.72 = 856.68 : x
2. Step 2: Convert to fraction form
   2,588.44/3,881.72 = 856.68/x
3. Step 3: Cross multiply
   2,588.44x = 3,881.72 × 856.68
4. Step 4: Simplify right side
   2,588.44x = 3,325,391.89
5. Step 5: Solve for x
   x = 3,325,391.89/2,588.44
6. Step 6: Final answer
   x = 1,284.71