Finding the Fourth Proportional to 2,197.98, 3,297.72 and 1,274.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,197.98 : 3,297.72 = 1,274.31 : x
2. Step 2: Convert to fraction form
   2,197.98/3,297.72 = 1,274.31/x
3. Step 3: Cross multiply
   2,197.98x = 3,297.72 × 1,274.31
4. Step 4: Simplify right side
   2,197.98x = 4,202,317.57
5. Step 5: Solve for x
   x = 4,202,317.57/2,197.98
6. Step 6: Final answer
   x = 1,911.90