Finding the Fourth Proportional to 2,200.21, 3,036.29 and 1,205.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.21 : 3,036.29 = 1,205.55 : x
2. Step 2: Convert to fraction form
   2,200.21/3,036.29 = 1,205.55/x
3. Step 3: Cross multiply
   2,200.21x = 3,036.29 × 1,205.55
4. Step 4: Simplify right side
   2,200.21x = 3,660,399.41
5. Step 5: Solve for x
   x = 3,660,399.41/2,200.21
6. Step 6: Final answer
   x = 1,663.66