Finding the Fourth Proportional to 2,664.36, 3,992.76 and 2,540.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.36 : 3,992.76 = 2,540.34 : x
2. Step 2: Convert to fraction form
   2,664.36/3,992.76 = 2,540.34/x
3. Step 3: Cross multiply
   2,664.36x = 3,992.76 × 2,540.34
4. Step 4: Simplify right side
   2,664.36x = 10,142,967.94
5. Step 5: Solve for x
   x = 10,142,967.94/2,664.36
6. Step 6: Final answer
   x = 3,806.91