Finding the Fourth Proportional to 3,638.70, 5,460.42 and 1,996.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.70 : 5,460.42 = 1,996.38 : x
2. Step 2: Convert to fraction form
   3,638.70/5,460.42 = 1,996.38/x
3. Step 3: Cross multiply
   3,638.70x = 5,460.42 × 1,996.38
4. Step 4: Simplify right side
   3,638.70x = 10,901,073.28
5. Step 5: Solve for x
   x = 10,901,073.28/3,638.70
6. Step 6: Final answer
   x = 2,995.87