Finding the Fourth Proportional to 2,359.03, 3,538.59 and 857.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.03 : 3,538.59 = 857.99 : x
2. Step 2: Convert to fraction form
   2,359.03/3,538.59 = 857.99/x
3. Step 3: Cross multiply
   2,359.03x = 3,538.59 × 857.99
4. Step 4: Simplify right side
   2,359.03x = 3,036,087.03
5. Step 5: Solve for x
   x = 3,036,087.03/2,359.03
6. Step 6: Final answer
   x = 1,287.01