Finding the Fourth Proportional to 3,675.90, 5,072.77 and 1,997.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,675.90 : 5,072.77 = 1,997.31 : x
2. Step 2: Convert to fraction form
   3,675.90/5,072.77 = 1,997.31/x
3. Step 3: Cross multiply
   3,675.90x = 5,072.77 × 1,997.31
4. Step 4: Simplify right side
   3,675.90x = 10,131,870.23
5. Step 5: Solve for x
   x = 10,131,870.23/3,675.90
6. Step 6: Final answer
   x = 2,756.30