Finding the Fourth Proportional to 1,488.94, 2,228.78 and 1,099.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.94 : 2,228.78 = 1,099.38 : x
2. Step 2: Convert to fraction form
   1,488.94/2,228.78 = 1,099.38/x
3. Step 3: Cross multiply
   1,488.94x = 2,228.78 × 1,099.38
4. Step 4: Simplify right side
   1,488.94x = 2,450,265.01
5. Step 5: Solve for x
   x = 2,450,265.01/1,488.94
6. Step 6: Final answer
   x = 1,645.64