Finding the Fourth Proportional to 2,055.72, 3,083.94 and 668.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.72 : 3,083.94 = 668.91 : x
2. Step 2: Convert to fraction form
   2,055.72/3,083.94 = 668.91/x
3. Step 3: Cross multiply
   2,055.72x = 3,083.94 × 668.91
4. Step 4: Simplify right side
   2,055.72x = 2,062,878.31
5. Step 5: Solve for x
   x = 2,062,878.31/2,055.72
6. Step 6: Final answer
   x = 1,003.48