Finding the Fourth Proportional to 2,227.42, 3,069.66 and 1,638.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.42 : 3,069.66 = 1,638.28 : x
2. Step 2: Convert to fraction form
   2,227.42/3,069.66 = 1,638.28/x
3. Step 3: Cross multiply
   2,227.42x = 3,069.66 × 1,638.28
4. Step 4: Simplify right side
   2,227.42x = 5,028,962.58
5. Step 5: Solve for x
   x = 5,028,962.58/2,227.42
6. Step 6: Final answer
   x = 2,257.75