Finding the Fourth Proportional to 3,675.88, 5,072.72 and 1,997.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,675.88 : 5,072.72 = 1,997.31 : x
2. Step 2: Convert to fraction form
   3,675.88/5,072.72 = 1,997.31/x
3. Step 3: Cross multiply
   3,675.88x = 5,072.72 × 1,997.31
4. Step 4: Simplify right side
   3,675.88x = 10,131,764.03
5. Step 5: Solve for x
   x = 10,131,764.03/3,675.88
6. Step 6: Final answer
   x = 2,756.28