Finding the Fourth Proportional to 2,114.78, 2,918.41 and 1,170.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.78 : 2,918.41 = 1,170.54 : x
2. Step 2: Convert to fraction form
   2,114.78/2,918.41 = 1,170.54/x
3. Step 3: Cross multiply
   2,114.78x = 2,918.41 × 1,170.54
4. Step 4: Simplify right side
   2,114.78x = 3,416,112.72
5. Step 5: Solve for x
   x = 3,416,112.72/2,114.78
6. Step 6: Final answer
   x = 1,615.36