Finding the Fourth Proportional to 1,141.78, 1,574.34 and 843.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.78 : 1,574.34 = 843.46 : x
2. Step 2: Convert to fraction form
   1,141.78/1,574.34 = 843.46/x
3. Step 3: Cross multiply
   1,141.78x = 1,574.34 × 843.46
4. Step 4: Simplify right side
   1,141.78x = 1,327,890.46
5. Step 5: Solve for x
   x = 1,327,890.46/1,141.78
6. Step 6: Final answer
   x = 1,163.00