Finding the Fourth Proportional to 2,075.12, 2,863.83 and 1,191.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.12 : 2,863.83 = 1,191.20 : x
2. Step 2: Convert to fraction form
   2,075.12/2,863.83 = 1,191.20/x
3. Step 3: Cross multiply
   2,075.12x = 2,863.83 × 1,191.20
4. Step 4: Simplify right side
   2,075.12x = 3,411,379.98
5. Step 5: Solve for x
   x = 3,411,379.98/2,075.12
6. Step 6: Final answer
   x = 1,643.95