Finding the Fourth Proportional to 2,642.29, 3,962.86 and 1,081.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.29 : 3,962.86 = 1,081.89 : x
2. Step 2: Convert to fraction form
   2,642.29/3,962.86 = 1,081.89/x
3. Step 3: Cross multiply
   2,642.29x = 3,962.86 × 1,081.89
4. Step 4: Simplify right side
   2,642.29x = 4,287,375.90
5. Step 5: Solve for x
   x = 4,287,375.90/2,642.29
6. Step 6: Final answer
   x = 1,622.60