Finding the Fourth Proportional to 1,303.05, 1,801.68 and 1,139.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,303.05 : 1,801.68 = 1,139.04 : x
2. Step 2: Convert to fraction form
   1,303.05/1,801.68 = 1,139.04/x
3. Step 3: Cross multiply
   1,303.05x = 1,801.68 × 1,139.04
4. Step 4: Simplify right side
   1,303.05x = 2,052,185.59
5. Step 5: Solve for x
   x = 2,052,185.59/1,303.05
6. Step 6: Final answer
   x = 1,574.91