Finding the Fourth Proportional to 1,855.27, 2,560.35 and 1,069.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.27 : 2,560.35 = 1,069.39 : x
2. Step 2: Convert to fraction form
   1,855.27/2,560.35 = 1,069.39/x
3. Step 3: Cross multiply
   1,855.27x = 2,560.35 × 1,069.39
4. Step 4: Simplify right side
   1,855.27x = 2,738,012.69
5. Step 5: Solve for x
   x = 2,738,012.69/1,855.27
6. Step 6: Final answer
   x = 1,475.80