Finding the Fourth Proportional to 1,442.31, 1,993.46 and 1,271.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.31 : 1,993.46 = 1,271.67 : x
2. Step 2: Convert to fraction form
   1,442.31/1,993.46 = 1,271.67/x
3. Step 3: Cross multiply
   1,442.31x = 1,993.46 × 1,271.67
4. Step 4: Simplify right side
   1,442.31x = 2,535,016.92
5. Step 5: Solve for x
   x = 2,535,016.92/1,442.31
6. Step 6: Final answer
   x = 1,757.61