Finding the Fourth Proportional to 1,871.63, 2,582.69 and 1,085.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.63 : 2,582.69 = 1,085.72 : x
2. Step 2: Convert to fraction form
   1,871.63/2,582.69 = 1,085.72/x
3. Step 3: Cross multiply
   1,871.63x = 2,582.69 × 1,085.72
4. Step 4: Simplify right side
   1,871.63x = 2,804,078.19
5. Step 5: Solve for x
   x = 2,804,078.19/1,871.63
6. Step 6: Final answer
   x = 1,498.20