Finding the Fourth Proportional to 2,802.42, 4,203.42 and 854.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,802.42 : 4,203.42 = 854.50 : x
2. Step 2: Convert to fraction form
   2,802.42/4,203.42 = 854.50/x
3. Step 3: Cross multiply
   2,802.42x = 4,203.42 × 854.50
4. Step 4: Simplify right side
   2,802.42x = 3,591,822.39
5. Step 5: Solve for x
   x = 3,591,822.39/2,802.42
6. Step 6: Final answer
   x = 1,281.69