Finding the Fourth Proportional to 1,273.89, 1,761.03 and 1,142.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.89 : 1,761.03 = 1,142.67 : x
2. Step 2: Convert to fraction form
   1,273.89/1,761.03 = 1,142.67/x
3. Step 3: Cross multiply
   1,273.89x = 1,761.03 × 1,142.67
4. Step 4: Simplify right side
   1,273.89x = 2,012,276.15
5. Step 5: Solve for x
   x = 2,012,276.15/1,273.89
6. Step 6: Final answer
   x = 1,579.63