Finding the Fourth Proportional to 2,145.72, 3,218.94 and 1,050.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.72 : 3,218.94 = 1,050.18 : x
2. Step 2: Convert to fraction form
   2,145.72/3,218.94 = 1,050.18/x
3. Step 3: Cross multiply
   2,145.72x = 3,218.94 × 1,050.18
4. Step 4: Simplify right side
   2,145.72x = 3,380,466.41
5. Step 5: Solve for x
   x = 3,380,466.41/2,145.72
6. Step 6: Final answer
   x = 1,575.45