Finding the Fourth Proportional to 2,005.21, 3,009.84 and 1,859.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.21 : 3,009.84 = 1,859.41 : x
2. Step 2: Convert to fraction form
   2,005.21/3,009.84 = 1,859.41/x
3. Step 3: Cross multiply
   2,005.21x = 3,009.84 × 1,859.41
4. Step 4: Simplify right side
   2,005.21x = 5,596,526.59
5. Step 5: Solve for x
   x = 5,596,526.59/2,005.21
6. Step 6: Final answer
   x = 2,790.99