Finding the Fourth Proportional to 2,540.94, 3,804.93 and 1,239

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.94 : 3,804.93 = 1,239 : x
2. Step 2: Convert to fraction form
   2,540.94/3,804.93 = 1,239/x
3. Step 3: Cross multiply
   2,540.94x = 3,804.93 × 1,239
4. Step 4: Simplify right side
   2,540.94x = 4,714,308.27
5. Step 5: Solve for x
   x = 4,714,308.27/2,540.94
6. Step 6: Final answer
   x = 1,855.34