Finding the Fourth Proportional to 2,521.16, 3,782.38 and 789.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.16 : 3,782.38 = 789.80 : x
2. Step 2: Convert to fraction form
   2,521.16/3,782.38 = 789.80/x
3. Step 3: Cross multiply
   2,521.16x = 3,782.38 × 789.80
4. Step 4: Simplify right side
   2,521.16x = 2,987,323.72
5. Step 5: Solve for x
   x = 2,987,323.72/2,521.16
6. Step 6: Final answer
   x = 1,184.90