Finding the Fourth Proportional to 1,871.76, 2,583.06 and 1,086.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.76 : 2,583.06 = 1,086.12 : x
2. Step 2: Convert to fraction form
   1,871.76/2,583.06 = 1,086.12/x
3. Step 3: Cross multiply
   1,871.76x = 2,583.06 × 1,086.12
4. Step 4: Simplify right side
   1,871.76x = 2,805,513.13
5. Step 5: Solve for x
   x = 2,805,513.13/1,871.76
6. Step 6: Final answer
   x = 1,498.86