Finding the Fourth Proportional to 2,855.52, 3,939.12 and 1,805.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,855.52 : 3,939.12 = 1,805.76 : x
2. Step 2: Convert to fraction form
   2,855.52/3,939.12 = 1,805.76/x
3. Step 3: Cross multiply
   2,855.52x = 3,939.12 × 1,805.76
4. Step 4: Simplify right side
   2,855.52x = 7,113,105.33
5. Step 5: Solve for x
   x = 7,113,105.33/2,855.52
6. Step 6: Final answer
   x = 2,491.00