Finding the Fourth Proportional to 1,404.96, 2,105.10 and 855.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.96 : 2,105.10 = 855.46 : x
2. Step 2: Convert to fraction form
   1,404.96/2,105.10 = 855.46/x
3. Step 3: Cross multiply
   1,404.96x = 2,105.10 × 855.46
4. Step 4: Simplify right side
   1,404.96x = 1,800,828.85
5. Step 5: Solve for x
   x = 1,800,828.85/1,404.96
6. Step 6: Final answer
   x = 1,281.77