Finding the Fourth Proportional to 2,075.40, 2,864.03 and 1,131.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.40 : 2,864.03 = 1,131.21 : x
2. Step 2: Convert to fraction form
   2,075.40/2,864.03 = 1,131.21/x
3. Step 3: Cross multiply
   2,075.40x = 2,864.03 × 1,131.21
4. Step 4: Simplify right side
   2,075.40x = 3,239,813.72
5. Step 5: Solve for x
   x = 3,239,813.72/2,075.40
6. Step 6: Final answer
   x = 1,561.06