Finding the Fourth Proportional to 2,362.12, 3,542.04 and 860.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,362.12 : 3,542.04 = 860.80 : x
2. Step 2: Convert to fraction form
   2,362.12/3,542.04 = 860.80/x
3. Step 3: Cross multiply
   2,362.12x = 3,542.04 × 860.80
4. Step 4: Simplify right side
   2,362.12x = 3,048,988.03
5. Step 5: Solve for x
   x = 3,048,988.03/2,362.12
6. Step 6: Final answer
   x = 1,290.78