Finding the Fourth Proportional to 2,641.88, 3,961.68 and 1,080.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.88 : 3,961.68 = 1,080.82 : x
2. Step 2: Convert to fraction form
   2,641.88/3,961.68 = 1,080.82/x
3. Step 3: Cross multiply
   2,641.88x = 3,961.68 × 1,080.82
4. Step 4: Simplify right side
   2,641.88x = 4,281,862.98
5. Step 5: Solve for x
   x = 4,281,862.98/2,641.88
6. Step 6: Final answer
   x = 1,620.76