Finding the Fourth Proportional to 2,089.56, 3,137.91 and 1,855.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.56 : 3,137.91 = 1,855.81 : x
2. Step 2: Convert to fraction form
   2,089.56/3,137.91 = 1,855.81/x
3. Step 3: Cross multiply
   2,089.56x = 3,137.91 × 1,855.81
4. Step 4: Simplify right side
   2,089.56x = 5,823,364.76
5. Step 5: Solve for x
   x = 5,823,364.76/2,089.56
6. Step 6: Final answer
   x = 2,786.89