Finding the Fourth Proportional to 1,920.69, 2,880.90 and 1,096.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.69 : 2,880.90 = 1,096.38 : x
2. Step 2: Convert to fraction form
   1,920.69/2,880.90 = 1,096.38/x
3. Step 3: Cross multiply
   1,920.69x = 2,880.90 × 1,096.38
4. Step 4: Simplify right side
   1,920.69x = 3,158,561.14
5. Step 5: Solve for x
   x = 3,158,561.14/1,920.69
6. Step 6: Final answer
   x = 1,644.49