Finding the Fourth Proportional to 1,676.52, 2,513.52 and 854.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,676.52 : 2,513.52 = 854.40 : x
2. Step 2: Convert to fraction form
   1,676.52/2,513.52 = 854.40/x
3. Step 3: Cross multiply
   1,676.52x = 2,513.52 × 854.40
4. Step 4: Simplify right side
   1,676.52x = 2,147,551.49
5. Step 5: Solve for x
   x = 2,147,551.49/1,676.52
6. Step 6: Final answer
   x = 1,280.96