Finding the Fourth Proportional to 2,877.12, 3,962.72 and 2,286.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,877.12 : 3,962.72 = 2,286.63 : x
2. Step 2: Convert to fraction form
   2,877.12/3,962.72 = 2,286.63/x
3. Step 3: Cross multiply
   2,877.12x = 3,962.72 × 2,286.63
4. Step 4: Simplify right side
   2,877.12x = 9,061,280.15
5. Step 5: Solve for x
   x = 9,061,280.15/2,877.12
6. Step 6: Final answer
   x = 3,149.43