Finding the Fourth Proportional to 2,269.36, 3,131.78 and 1,274.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.36 : 3,131.78 = 1,274.72 : x
2. Step 2: Convert to fraction form
   2,269.36/3,131.78 = 1,274.72/x
3. Step 3: Cross multiply
   2,269.36x = 3,131.78 × 1,274.72
4. Step 4: Simplify right side
   2,269.36x = 3,992,120.57
5. Step 5: Solve for x
   x = 3,992,120.57/2,269.36
6. Step 6: Final answer
   x = 1,759.14