Finding the Fourth Proportional to 3,855.38, 5,320.42 and 2,087.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,855.38 : 5,320.42 = 2,087.00 : x
2. Step 2: Convert to fraction form
   3,855.38/5,320.42 = 2,087.00/x
3. Step 3: Cross multiply
   3,855.38x = 5,320.42 × 2,087.00
4. Step 4: Simplify right side
   3,855.38x = 11,103,689.94
5. Step 5: Solve for x
   x = 11,103,689.94/3,855.38
6. Step 6: Final answer
   x = 2,880.05