Finding the Fourth Proportional to 3,128.52, 4,315.48 and 2,066.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.52 : 4,315.48 = 2,066.31 : x
2. Step 2: Convert to fraction form
   3,128.52/4,315.48 = 2,066.31/x
3. Step 3: Cross multiply
   3,128.52x = 4,315.48 × 2,066.31
4. Step 4: Simplify right side
   3,128.52x = 8,917,114.31
5. Step 5: Solve for x
   x = 8,917,114.31/3,128.52
6. Step 6: Final answer
   x = 2,850.26