Finding the Fourth Proportional to 2,005.55, 3,021.70 and 1,810.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.55 : 3,021.70 = 1,810.77 : x
2. Step 2: Convert to fraction form
   2,005.55/3,021.70 = 1,810.77/x
3. Step 3: Cross multiply
   2,005.55x = 3,021.70 × 1,810.77
4. Step 4: Simplify right side
   2,005.55x = 5,471,603.71
5. Step 5: Solve for x
   x = 5,471,603.71/2,005.55
6. Step 6: Final answer
   x = 2,728.23