Finding the Fourth Proportional to 1,860.58, 2,789.99 and 1,080.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,860.58 : 2,789.99 = 1,080.83 : x
2. Step 2: Convert to fraction form
   1,860.58/2,789.99 = 1,080.83/x
3. Step 3: Cross multiply
   1,860.58x = 2,789.99 × 1,080.83
4. Step 4: Simplify right side
   1,860.58x = 3,015,504.89
5. Step 5: Solve for x
   x = 3,015,504.89/1,860.58
6. Step 6: Final answer
   x = 1,620.73