Finding the Fourth Proportional to 2,543.59, 3,815.49 and 788.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.59 : 3,815.49 = 788.44 : x
2. Step 2: Convert to fraction form
   2,543.59/3,815.49 = 788.44/x
3. Step 3: Cross multiply
   2,543.59x = 3,815.49 × 788.44
4. Step 4: Simplify right side
   2,543.59x = 3,008,284.94
5. Step 5: Solve for x
   x = 3,008,284.94/2,543.59
6. Step 6: Final answer
   x = 1,182.69