Finding the Fourth Proportional to 1,339.84, 1,849.80 and 868.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.84 : 1,849.80 = 868.16 : x
2. Step 2: Convert to fraction form
   1,339.84/1,849.80 = 868.16/x
3. Step 3: Cross multiply
   1,339.84x = 1,849.80 × 868.16
4. Step 4: Simplify right side
   1,339.84x = 1,605,922.37
5. Step 5: Solve for x
   x = 1,605,922.37/1,339.84
6. Step 6: Final answer
   x = 1,198.59