Finding the Fourth Proportional to 1,294.57, 1,786.21 and 1,085.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.57 : 1,786.21 = 1,085.59 : x
2. Step 2: Convert to fraction form
   1,294.57/1,786.21 = 1,085.59/x
3. Step 3: Cross multiply
   1,294.57x = 1,786.21 × 1,085.59
4. Step 4: Simplify right side
   1,294.57x = 1,939,091.71
5. Step 5: Solve for x
   x = 1,939,091.71/1,294.57
6. Step 6: Final answer
   x = 1,497.87