Finding the Fourth Proportional to 2,270.78, 3,133.51 and 1,275.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,270.78 : 3,133.51 = 1,275.87 : x
2. Step 2: Convert to fraction form
   2,270.78/3,133.51 = 1,275.87/x
3. Step 3: Cross multiply
   2,270.78x = 3,133.51 × 1,275.87
4. Step 4: Simplify right side
   2,270.78x = 3,997,945.02
5. Step 5: Solve for x
   x = 3,997,945.02/2,270.78
6. Step 6: Final answer
   x = 1,760.60