Finding the Fourth Proportional to 1,352.72, 1,865.52 and 854.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.72 : 1,865.52 = 854.49 : x
2. Step 2: Convert to fraction form
   1,352.72/1,865.52 = 854.49/x
3. Step 3: Cross multiply
   1,352.72x = 1,865.52 × 854.49
4. Step 4: Simplify right side
   1,352.72x = 1,594,075.18
5. Step 5: Solve for x
   x = 1,594,075.18/1,352.72
6. Step 6: Final answer
   x = 1,178.42