Finding the Fourth Proportional to 2,269.53, 3,131.78 and 1,274.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.53 : 3,131.78 = 1,274.61 : x
2. Step 2: Convert to fraction form
   2,269.53/3,131.78 = 1,274.61/x
3. Step 3: Cross multiply
   2,269.53x = 3,131.78 × 1,274.61
4. Step 4: Simplify right side
   2,269.53x = 3,991,810.65
5. Step 5: Solve for x
   x = 3,991,810.65/2,269.53
6. Step 6: Final answer
   x = 1,758.87