Finding the Fourth Proportional to 2,087.36, 3,131.46 and 788.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.36 : 3,131.46 = 788.84 : x
2. Step 2: Convert to fraction form
   2,087.36/3,131.46 = 788.84/x
3. Step 3: Cross multiply
   2,087.36x = 3,131.46 × 788.84
4. Step 4: Simplify right side
   2,087.36x = 2,470,220.91
5. Step 5: Solve for x
   x = 2,470,220.91/2,087.36
6. Step 6: Final answer
   x = 1,183.42