Finding the Fourth Proportional to 1,871.57, 2,582.76 and 1,086.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.57 : 2,582.76 = 1,086.07 : x
2. Step 2: Convert to fraction form
   1,871.57/2,582.76 = 1,086.07/x
3. Step 3: Cross multiply
   1,871.57x = 2,582.76 × 1,086.07
4. Step 4: Simplify right side
   1,871.57x = 2,805,058.15
5. Step 5: Solve for x
   x = 2,805,058.15/1,871.57
6. Step 6: Final answer
   x = 1,498.77