Finding the Fourth Proportional to 2,987.27, 4,481.64 and 1,039.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.27 : 4,481.64 = 1,039.49 : x
2. Step 2: Convert to fraction form
   2,987.27/4,481.64 = 1,039.49/x
3. Step 3: Cross multiply
   2,987.27x = 4,481.64 × 1,039.49
4. Step 4: Simplify right side
   2,987.27x = 4,658,597.56
5. Step 5: Solve for x
   x = 4,658,597.56/2,987.27
6. Step 6: Final answer
   x = 1,559.49