Finding the Fourth Proportional to 8,987.94, 13,481.98 and 3,144.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.94 : 13,481.98 = 3,144.58 : x
2. Step 2: Convert to fraction form
   8,987.94/13,481.98 = 3,144.58/x
3. Step 3: Cross multiply
   8,987.94x = 13,481.98 × 3,144.58
4. Step 4: Simplify right side
   8,987.94x = 42,395,164.67
5. Step 5: Solve for x
   x = 42,395,164.67/8,987.94
6. Step 6: Final answer
   x = 4,716.89