Finding the Fourth Proportional to 2,801.94, 4,203.39 and 854.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.94 : 4,203.39 = 854.10 : x
2. Step 2: Convert to fraction form
   2,801.94/4,203.39 = 854.10/x
3. Step 3: Cross multiply
   2,801.94x = 4,203.39 × 854.10
4. Step 4: Simplify right side
   2,801.94x = 3,590,115.40
5. Step 5: Solve for x
   x = 3,590,115.40/2,801.94
6. Step 6: Final answer
   x = 1,281.30