Finding the Fourth Proportional to 1,339.88, 1,849.30 and 868.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.88 : 1,849.30 = 868.36 : x
2. Step 2: Convert to fraction form
   1,339.88/1,849.30 = 868.36/x
3. Step 3: Cross multiply
   1,339.88x = 1,849.30 × 868.36
4. Step 4: Simplify right side
   1,339.88x = 1,605,858.15
5. Step 5: Solve for x
   x = 1,605,858.15/1,339.88
6. Step 6: Final answer
   x = 1,198.51