Finding the Fourth Proportional to 2,075.46, 2,864.40 and 1,289.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.46 : 2,864.40 = 1,289.61 : x
2. Step 2: Convert to fraction form
   2,075.46/2,864.40 = 1,289.61/x
3. Step 3: Cross multiply
   2,075.46x = 2,864.40 × 1,289.61
4. Step 4: Simplify right side
   2,075.46x = 3,693,958.88
5. Step 5: Solve for x
   x = 3,693,958.88/2,075.46
6. Step 6: Final answer
   x = 1,779.83