Finding the Fourth Proportional to 2,687.72, 3,711.87 and 1,850.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,687.72 : 3,711.87 = 1,850.59 : x
2. Step 2: Convert to fraction form
   2,687.72/3,711.87 = 1,850.59/x
3. Step 3: Cross multiply
   2,687.72x = 3,711.87 × 1,850.59
4. Step 4: Simplify right side
   2,687.72x = 6,869,149.50
5. Step 5: Solve for x
   x = 6,869,149.50/2,687.72
6. Step 6: Final answer
   x = 2,555.75