Finding the Fourth Proportional to 2,767.58, 4,150.95 and 918.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,767.58 : 4,150.95 = 918.72 : x
2. Step 2: Convert to fraction form
   2,767.58/4,150.95 = 918.72/x
3. Step 3: Cross multiply
   2,767.58x = 4,150.95 × 918.72
4. Step 4: Simplify right side
   2,767.58x = 3,813,557.34
5. Step 5: Solve for x
   x = 3,813,557.34/2,767.58
6. Step 6: Final answer
   x = 1,377.94