Finding the Fourth Proportional to 2,075.28, 3,111.96 and 1,209.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.28 : 3,111.96 = 1,209.84 : x
2. Step 2: Convert to fraction form
   2,075.28/3,111.96 = 1,209.84/x
3. Step 3: Cross multiply
   2,075.28x = 3,111.96 × 1,209.84
4. Step 4: Simplify right side
   2,075.28x = 3,764,973.69
5. Step 5: Solve for x
   x = 3,764,973.69/2,075.28
6. Step 6: Final answer
   x = 1,814.20