Finding the Fourth Proportional to 8,986.52, 13,481.60 and 3,147.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,986.52 : 13,481.60 = 3,147.23 : x
2. Step 2: Convert to fraction form
   8,986.52/13,481.60 = 3,147.23/x
3. Step 3: Cross multiply
   8,986.52x = 13,481.60 × 3,147.23
4. Step 4: Simplify right side
   8,986.52x = 42,429,612.82
5. Step 5: Solve for x
   x = 42,429,612.82/8,986.52
6. Step 6: Final answer
   x = 4,721.48