Finding the Fourth Proportional to 2,641.75, 3,962.52 and 1,081.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.75 : 3,962.52 = 1,081.31 : x
2. Step 2: Convert to fraction form
   2,641.75/3,962.52 = 1,081.31/x
3. Step 3: Cross multiply
   2,641.75x = 3,962.52 × 1,081.31
4. Step 4: Simplify right side
   2,641.75x = 4,284,696.74
5. Step 5: Solve for x
   x = 4,284,696.74/2,641.75
6. Step 6: Final answer
   x = 1,621.92