Finding the Fourth Proportional to 2,641.55, 3,962.49 and 886.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.55 : 3,962.49 = 886.71 : x
2. Step 2: Convert to fraction form
   2,641.55/3,962.49 = 886.71/x
3. Step 3: Cross multiply
   2,641.55x = 3,962.49 × 886.71
4. Step 4: Simplify right side
   2,641.55x = 3,513,591.04
5. Step 5: Solve for x
   x = 3,513,591.04/2,641.55
6. Step 6: Final answer
   x = 1,330.13