Finding the Fourth Proportional to 2,856.24, 3,961.62 and 2,739.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.24 : 3,961.62 = 2,739.60 : x
2. Step 2: Convert to fraction form
   2,856.24/3,961.62 = 2,739.60/x
3. Step 3: Cross multiply
   2,856.24x = 3,961.62 × 2,739.60
4. Step 4: Simplify right side
   2,856.24x = 10,853,254.15
5. Step 5: Solve for x
   x = 10,853,254.15/2,856.24
6. Step 6: Final answer
   x = 3,799.84