Finding the Fourth Proportional to 2,741.28, 4,111.77 and 986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,741.28 : 4,111.77 = 986.31 : x
2. Step 2: Convert to fraction form
   2,741.28/4,111.77 = 986.31/x
3. Step 3: Cross multiply
   2,741.28x = 4,111.77 × 986.31
4. Step 4: Simplify right side
   2,741.28x = 4,055,479.87
5. Step 5: Solve for x
   x = 4,055,479.87/2,741.28
6. Step 6: Final answer
   x = 1,479.41