Finding the Fourth Proportional to 2,540.69, 3,811.91 and 1,815.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.69 : 3,811.91 = 1,815.92 : x
2. Step 2: Convert to fraction form
   2,540.69/3,811.91 = 1,815.92/x
3. Step 3: Cross multiply
   2,540.69x = 3,811.91 × 1,815.92
4. Step 4: Simplify right side
   2,540.69x = 6,922,095.47
5. Step 5: Solve for x
   x = 6,922,095.47/2,540.69
6. Step 6: Final answer
   x = 2,724.50