Finding the Fourth Proportional to 1,257.84, 1,736.42 and 838.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257.84 : 1,736.42 = 838.89 : x
2. Step 2: Convert to fraction form
   1,257.84/1,736.42 = 838.89/x
3. Step 3: Cross multiply
   1,257.84x = 1,736.42 × 838.89
4. Step 4: Simplify right side
   1,257.84x = 1,456,665.37
5. Step 5: Solve for x
   x = 1,456,665.37/1,257.84
6. Step 6: Final answer
   x = 1,158.07