Finding the Fourth Proportional to 2,641.75, 3,963.57 and 910.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.75 : 3,963.57 = 910.51 : x
2. Step 2: Convert to fraction form
   2,641.75/3,963.57 = 910.51/x
3. Step 3: Cross multiply
   2,641.75x = 3,963.57 × 910.51
4. Step 4: Simplify right side
   2,641.75x = 3,608,870.12
5. Step 5: Solve for x
   x = 3,608,870.12/2,641.75
6. Step 6: Final answer
   x = 1,366.09