Finding the Fourth Proportional to 1,916.07, 2,644.17 and 1,076.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.07 : 2,644.17 = 1,076.78 : x
2. Step 2: Convert to fraction form
   1,916.07/2,644.17 = 1,076.78/x
3. Step 3: Cross multiply
   1,916.07x = 2,644.17 × 1,076.78
4. Step 4: Simplify right side
   1,916.07x = 2,847,176.15
5. Step 5: Solve for x
   x = 2,847,176.15/1,916.07
6. Step 6: Final answer
   x = 1,485.95