Finding the Fourth Proportional to 2,544.66, 3,815.61 and 788.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,544.66 : 3,815.61 = 788.91 : x
2. Step 2: Convert to fraction form
   2,544.66/3,815.61 = 788.91/x
3. Step 3: Cross multiply
   2,544.66x = 3,815.61 × 788.91
4. Step 4: Simplify right side
   2,544.66x = 3,010,160.06
5. Step 5: Solve for x
   x = 3,010,160.06/2,544.66
6. Step 6: Final answer
   x = 1,182.93