Finding the Fourth Proportional to 1,339.40, 1,849.18 and 874.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.40 : 1,849.18 = 874.46 : x
2. Step 2: Convert to fraction form
   1,339.40/1,849.18 = 874.46/x
3. Step 3: Cross multiply
   1,339.40x = 1,849.18 × 874.46
4. Step 4: Simplify right side
   1,339.40x = 1,617,033.94
5. Step 5: Solve for x
   x = 1,617,033.94/1,339.40
6. Step 6: Final answer
   x = 1,207.28