Finding the Fourth Proportional to 3,638.72, 5,021.46 and 1,982.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.72 : 5,021.46 = 1,982.72 : x
2. Step 2: Convert to fraction form
   3,638.72/5,021.46 = 1,982.72/x
3. Step 3: Cross multiply
   3,638.72x = 5,021.46 × 1,982.72
4. Step 4: Simplify right side
   3,638.72x = 9,956,149.17
5. Step 5: Solve for x
   x = 9,956,149.17/3,638.72
6. Step 6: Final answer
   x = 2,736.17