Finding the Fourth Proportional to 1,871.60, 2,582.79 and 1,086.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.60 : 2,582.79 = 1,086.10 : x
2. Step 2: Convert to fraction form
   1,871.60/2,582.79 = 1,086.10/x
3. Step 3: Cross multiply
   1,871.60x = 2,582.79 × 1,086.10
4. Step 4: Simplify right side
   1,871.60x = 2,805,168.22
5. Step 5: Solve for x
   x = 2,805,168.22/1,871.60
6. Step 6: Final answer
   x = 1,498.81