Finding the Fourth Proportional to 2,269.76, 3,131.86 and 1,275.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.76 : 3,131.86 = 1,275.08 : x
2. Step 2: Convert to fraction form
   2,269.76/3,131.86 = 1,275.08/x
3. Step 3: Cross multiply
   2,269.76x = 3,131.86 × 1,275.08
4. Step 4: Simplify right side
   2,269.76x = 3,993,372.05
5. Step 5: Solve for x
   x = 3,993,372.05/2,269.76
6. Step 6: Final answer
   x = 1,759.38