Finding the Fourth Proportional to 2,185.47, 3,016.71 and 1,855.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.47 : 3,016.71 = 1,855.80 : x
2. Step 2: Convert to fraction form
   2,185.47/3,016.71 = 1,855.80/x
3. Step 3: Cross multiply
   2,185.47x = 3,016.71 × 1,855.80
4. Step 4: Simplify right side
   2,185.47x = 5,598,410.42
5. Step 5: Solve for x
   x = 5,598,410.42/2,185.47
6. Step 6: Final answer
   x = 2,561.65