Finding the Fourth Proportional to 2,055.38, 3,083.12 and 668.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.38 : 3,083.12 = 668.72 : x
2. Step 2: Convert to fraction form
   2,055.38/3,083.12 = 668.72/x
3. Step 3: Cross multiply
   2,055.38x = 3,083.12 × 668.72
4. Step 4: Simplify right side
   2,055.38x = 2,061,744.01
5. Step 5: Solve for x
   x = 2,061,744.01/2,055.38
6. Step 6: Final answer
   x = 1,003.10