Finding the Fourth Proportional to 3,665.91, 5,488.53 and 2,853.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.91 : 5,488.53 = 2,853.69 : x
2. Step 2: Convert to fraction form
   3,665.91/5,488.53 = 2,853.69/x
3. Step 3: Cross multiply
   3,665.91x = 5,488.53 × 2,853.69
4. Step 4: Simplify right side
   3,665.91x = 15,662,563.18
5. Step 5: Solve for x
   x = 15,662,563.18/3,665.91
6. Step 6: Final answer
   x = 4,272.49