Finding the Fourth Proportional to 2,367.72, 3,549.60 and 1,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,367.72 : 3,549.60 = 1,638.72 : x
2. Step 2: Convert to fraction form
   2,367.72/3,549.60 = 1,638.72/x
3. Step 3: Cross multiply
   2,367.72x = 3,549.60 × 1,638.72
4. Step 4: Simplify right side
   2,367.72x = 5,816,800.51
5. Step 5: Solve for x
   x = 5,816,800.51/2,367.72
6. Step 6: Final answer
   x = 2,456.71