Finding the Fourth Proportional to 2,787.59, 4,181.27 and 839.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,787.59 : 4,181.27 = 839.75 : x
2. Step 2: Convert to fraction form
   2,787.59/4,181.27 = 839.75/x
3. Step 3: Cross multiply
   2,787.59x = 4,181.27 × 839.75
4. Step 4: Simplify right side
   2,787.59x = 3,511,196.38
5. Step 5: Solve for x
   x = 3,511,196.38/2,787.59
6. Step 6: Final answer
   x = 1,259.58