Finding the Fourth Proportional to 1,865.67, 2,800.23 and 1,086.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.67 : 2,800.23 = 1,086.54 : x
2. Step 2: Convert to fraction form
   1,865.67/2,800.23 = 1,086.54/x
3. Step 3: Cross multiply
   1,865.67x = 2,800.23 × 1,086.54
4. Step 4: Simplify right side
   1,865.67x = 3,042,561.90
5. Step 5: Solve for x
   x = 3,042,561.90/1,865.67
6. Step 6: Final answer
   x = 1,630.81