Finding the Fourth Proportional to 2,791.56, 4,185.78 and 916.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.56 : 4,185.78 = 916.56 : x
2. Step 2: Convert to fraction form
   2,791.56/4,185.78 = 916.56/x
3. Step 3: Cross multiply
   2,791.56x = 4,185.78 × 916.56
4. Step 4: Simplify right side
   2,791.56x = 3,836,518.52
5. Step 5: Solve for x
   x = 3,836,518.52/2,791.56
6. Step 6: Final answer
   x = 1,374.33