Finding the Fourth Proportional to 1,113.55, 1,676.24 and 854.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.55 : 1,676.24 = 854.98 : x
2. Step 2: Convert to fraction form
   1,113.55/1,676.24 = 854.98/x
3. Step 3: Cross multiply
   1,113.55x = 1,676.24 × 854.98
4. Step 4: Simplify right side
   1,113.55x = 1,433,155.94
5. Step 5: Solve for x
   x = 1,433,155.94/1,113.55
6. Step 6: Final answer
   x = 1,287.02