Finding the Fourth Proportional to 2,591.15, 3,886.61 and 1,031.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.15 : 3,886.61 = 1,031.09 : x
2. Step 2: Convert to fraction form
   2,591.15/3,886.61 = 1,031.09/x
3. Step 3: Cross multiply
   2,591.15x = 3,886.61 × 1,031.09
4. Step 4: Simplify right side
   2,591.15x = 4,007,420.12
5. Step 5: Solve for x
   x = 4,007,420.12/2,591.15
6. Step 6: Final answer
   x = 1,546.58