Finding the Fourth Proportional to 3,986.94, 5,511.60 and 3,654.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.94 : 5,511.60 = 3,654.84 : x
2. Step 2: Convert to fraction form
   3,986.94/5,511.60 = 3,654.84/x
3. Step 3: Cross multiply
   3,986.94x = 5,511.60 × 3,654.84
4. Step 4: Simplify right side
   3,986.94x = 20,144,016.14
5. Step 5: Solve for x
   x = 20,144,016.14/3,986.94
6. Step 6: Final answer
   x = 5,052.50