Finding the Fourth Proportional to 1,404.96, 2,105.85 and 855.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.96 : 2,105.85 = 855.93 : x
2. Step 2: Convert to fraction form
   1,404.96/2,105.85 = 855.93/x
3. Step 3: Cross multiply
   1,404.96x = 2,105.85 × 855.93
4. Step 4: Simplify right side
   1,404.96x = 1,802,460.19
5. Step 5: Solve for x
   x = 1,802,460.19/1,404.96
6. Step 6: Final answer
   x = 1,282.93