Finding the Fourth Proportional to 2,542.24, 3,811.85 and 786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.24 : 3,811.85 = 786.72 : x
2. Step 2: Convert to fraction form
   2,542.24/3,811.85 = 786.72/x
3. Step 3: Cross multiply
   2,542.24x = 3,811.85 × 786.72
4. Step 4: Simplify right side
   2,542.24x = 2,998,868.16
5. Step 5: Solve for x
   x = 2,998,868.16/2,542.24
6. Step 6: Final answer
   x = 1,179.62