Finding the Fourth Proportional to 3,052.50, 4,578.72 and 860.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,052.50 : 4,578.72 = 860.94 : x
2. Step 2: Convert to fraction form
   3,052.50/4,578.72 = 860.94/x
3. Step 3: Cross multiply
   3,052.50x = 4,578.72 × 860.94
4. Step 4: Simplify right side
   3,052.50x = 3,942,003.20
5. Step 5: Solve for x
   x = 3,942,003.20/3,052.50
6. Step 6: Final answer
   x = 1,291.40