Finding the Fourth Proportional to 1,141.49, 1,704.81 and 1,078.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.49 : 1,704.81 = 1,078.31 : x
2. Step 2: Convert to fraction form
   1,141.49/1,704.81 = 1,078.31/x
3. Step 3: Cross multiply
   1,141.49x = 1,704.81 × 1,078.31
4. Step 4: Simplify right side
   1,141.49x = 1,838,305.15
5. Step 5: Solve for x
   x = 1,838,305.15/1,141.49
6. Step 6: Final answer
   x = 1,610.45