Finding the Fourth Proportional to 2,061.21, 3,086.00 and 1,866.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.21 : 3,086.00 = 1,866.58 : x
2. Step 2: Convert to fraction form
   2,061.21/3,086.00 = 1,866.58/x
3. Step 3: Cross multiply
   2,061.21x = 3,086.00 × 1,866.58
4. Step 4: Simplify right side
   2,061.21x = 5,760,255.83
5. Step 5: Solve for x
   x = 5,760,255.83/2,061.21
6. Step 6: Final answer
   x = 2,794.59