Finding the Fourth Proportional to 2,145.10, 3,218.72 and 1,049.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.10 : 3,218.72 = 1,049.44 : x
2. Step 2: Convert to fraction form
   2,145.10/3,218.72 = 1,049.44/x
3. Step 3: Cross multiply
   2,145.10x = 3,218.72 × 1,049.44
4. Step 4: Simplify right side
   2,145.10x = 3,377,832.18
5. Step 5: Solve for x
   x = 3,377,832.18/2,145.10
6. Step 6: Final answer
   x = 1,574.68