Finding the Fourth Proportional to 1,862.55, 2,789.82 and 1,399.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,862.55 : 2,789.82 = 1,399.64 : x
2. Step 2: Convert to fraction form
   1,862.55/2,789.82 = 1,399.64/x
3. Step 3: Cross multiply
   1,862.55x = 2,789.82 × 1,399.64
4. Step 4: Simplify right side
   1,862.55x = 3,904,729.72
5. Step 5: Solve for x
   x = 3,904,729.72/1,862.55
6. Step 6: Final answer
   x = 2,096.44