Finding the Fourth Proportional to 2,087.48, 3,131.04 and 788.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.48 : 3,131.04 = 788.96 : x
2. Step 2: Convert to fraction form
   2,087.48/3,131.04 = 788.96/x
3. Step 3: Cross multiply
   2,087.48x = 3,131.04 × 788.96
4. Step 4: Simplify right side
   2,087.48x = 2,470,265.32
5. Step 5: Solve for x
   x = 2,470,265.32/2,087.48
6. Step 6: Final answer
   x = 1,183.37