Finding the Fourth Proportional to 1,778.52, 2,667.69 and 1,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.52 : 2,667.69 = 1,085.34 : x
2. Step 2: Convert to fraction form
   1,778.52/2,667.69 = 1,085.34/x
3. Step 3: Cross multiply
   1,778.52x = 2,667.69 × 1,085.34
4. Step 4: Simplify right side
   1,778.52x = 2,895,350.66
5. Step 5: Solve for x
   x = 2,895,350.66/1,778.52
6. Step 6: Final answer
   x = 1,627.96