Finding the Fourth Proportional to 2,078.51, 3,116.22 and 1,256.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.51 : 3,116.22 = 1,256.58 : x
2. Step 2: Convert to fraction form
   2,078.51/3,116.22 = 1,256.58/x
3. Step 3: Cross multiply
   2,078.51x = 3,116.22 × 1,256.58
4. Step 4: Simplify right side
   2,078.51x = 3,915,782.08
5. Step 5: Solve for x
   x = 3,915,782.08/2,078.51
6. Step 6: Final answer
   x = 1,883.94