Finding the Fourth Proportional to 2,591.33, 3,888.79 and 1,031.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.33 : 3,888.79 = 1,031.18 : x
2. Step 2: Convert to fraction form
   2,591.33/3,888.79 = 1,031.18/x
3. Step 3: Cross multiply
   2,591.33x = 3,888.79 × 1,031.18
4. Step 4: Simplify right side
   2,591.33x = 4,010,042.47
5. Step 5: Solve for x
   x = 4,010,042.47/2,591.33
6. Step 6: Final answer
   x = 1,547.48