Finding the Fourth Proportional to 2,229.88, 3,074.31 and 1,918.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,229.88 : 3,074.31 = 1,918.49 : x
2. Step 2: Convert to fraction form
   2,229.88/3,074.31 = 1,918.49/x
3. Step 3: Cross multiply
   2,229.88x = 3,074.31 × 1,918.49
4. Step 4: Simplify right side
   2,229.88x = 5,898,022.42
5. Step 5: Solve for x
   x = 5,898,022.42/2,229.88
6. Step 6: Final answer
   x = 2,645.00