Finding the Fourth Proportional to 1,778.42, 2,667.49 and 854.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.42 : 2,667.49 = 854.73 : x
2. Step 2: Convert to fraction form
   1,778.42/2,667.49 = 854.73/x
3. Step 3: Cross multiply
   1,778.42x = 2,667.49 × 854.73
4. Step 4: Simplify right side
   1,778.42x = 2,279,981.59
5. Step 5: Solve for x
   x = 2,279,981.59/1,778.42
6. Step 6: Final answer
   x = 1,282.02