Finding the Fourth Proportional to 3,909.35, 5,863.52 and 987.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.35 : 5,863.52 = 987.48 : x
2. Step 2: Convert to fraction form
   3,909.35/5,863.52 = 987.48/x
3. Step 3: Cross multiply
   3,909.35x = 5,863.52 × 987.48
4. Step 4: Simplify right side
   3,909.35x = 5,790,103.79
5. Step 5: Solve for x
   x = 5,790,103.79/3,909.35
6. Step 6: Final answer
   x = 1,481.09