Finding the Fourth Proportional to 1,294.89, 1,786.55 and 1,170.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.89 : 1,786.55 = 1,170.15 : x
2. Step 2: Convert to fraction form
   1,294.89/1,786.55 = 1,170.15/x
3. Step 3: Cross multiply
   1,294.89x = 1,786.55 × 1,170.15
4. Step 4: Simplify right side
   1,294.89x = 2,090,531.48
5. Step 5: Solve for x
   x = 2,090,531.48/1,294.89
6. Step 6: Final answer
   x = 1,614.45