Finding the Fourth Proportional to 3,909.52, 5,864.25 and 987.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.52 : 5,864.25 = 987.82 : x
2. Step 2: Convert to fraction form
   3,909.52/5,864.25 = 987.82/x
3. Step 3: Cross multiply
   3,909.52x = 5,864.25 × 987.82
4. Step 4: Simplify right side
   3,909.52x = 5,792,823.44
5. Step 5: Solve for x
   x = 5,792,823.44/3,909.52
6. Step 6: Final answer
   x = 1,481.72