Finding the Fourth Proportional to 2,767.20, 4,150.56 and 917.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,767.20 : 4,150.56 = 917.71 : x
2. Step 2: Convert to fraction form
   2,767.20/4,150.56 = 917.71/x
3. Step 3: Cross multiply
   2,767.20x = 4,150.56 × 917.71
4. Step 4: Simplify right side
   2,767.20x = 3,809,010.42
5. Step 5: Solve for x
   x = 3,809,010.42/2,767.20
6. Step 6: Final answer
   x = 1,376.49