Finding the Fourth Proportional to 1,916.38, 2,644.39 and 1,076.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.38 : 2,644.39 = 1,076.89 : x
2. Step 2: Convert to fraction form
   1,916.38/2,644.39 = 1,076.89/x
3. Step 3: Cross multiply
   1,916.38x = 2,644.39 × 1,076.89
4. Step 4: Simplify right side
   1,916.38x = 2,847,717.15
5. Step 5: Solve for x
   x = 2,847,717.15/1,916.38
6. Step 6: Final answer
   x = 1,485.99