Finding the Fourth Proportional to 2,269.28, 3,131.91 and 1,274.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.28 : 3,131.91 = 1,274.61 : x
2. Step 2: Convert to fraction form
   2,269.28/3,131.91 = 1,274.61/x
3. Step 3: Cross multiply
   2,269.28x = 3,131.91 × 1,274.61
4. Step 4: Simplify right side
   2,269.28x = 3,991,963.81
5. Step 5: Solve for x
   x = 3,991,963.81/2,269.28
6. Step 6: Final answer
   x = 1,759.14