Finding the Fourth Proportional to 2,601.03, 3,899.33 and 1,139.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.03 : 3,899.33 = 1,139.09 : x
2. Step 2: Convert to fraction form
   2,601.03/3,899.33 = 1,139.09/x
3. Step 3: Cross multiply
   2,601.03x = 3,899.33 × 1,139.09
4. Step 4: Simplify right side
   2,601.03x = 4,441,687.81
5. Step 5: Solve for x
   x = 4,441,687.81/2,601.03
6. Step 6: Final answer
   x = 1,707.66