Finding the Fourth Proportional to 2,270.42, 3,133.20 and 1,275.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,270.42 : 3,133.20 = 1,275.72 : x
2. Step 2: Convert to fraction form
   2,270.42/3,133.20 = 1,275.72/x
3. Step 3: Cross multiply
   2,270.42x = 3,133.20 × 1,275.72
4. Step 4: Simplify right side
   2,270.42x = 3,997,085.90
5. Step 5: Solve for x
   x = 3,997,085.90/2,270.42
6. Step 6: Final answer
   x = 1,760.51