Finding the Fourth Proportional to 2,105.09, 2,904.46 and 1,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.09 : 2,904.46 = 1,358.78 : x
2. Step 2: Convert to fraction form
   2,105.09/2,904.46 = 1,358.78/x
3. Step 3: Cross multiply
   2,105.09x = 2,904.46 × 1,358.78
4. Step 4: Simplify right side
   2,105.09x = 3,946,504.24
5. Step 5: Solve for x
   x = 3,946,504.24/2,105.09
6. Step 6: Final answer
   x = 1,874.74