Finding the Fourth Proportional to 2,590.88, 3,885.48 and 1,031.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.88 : 3,885.48 = 1,031.31 : x
2. Step 2: Convert to fraction form
   2,590.88/3,885.48 = 1,031.31/x
3. Step 3: Cross multiply
   2,590.88x = 3,885.48 × 1,031.31
4. Step 4: Simplify right side
   2,590.88x = 4,007,134.38
5. Step 5: Solve for x
   x = 4,007,134.38/2,590.88
6. Step 6: Final answer
   x = 1,546.63