Finding the Fourth Proportional to 2,206.42, 3,310.39 and 1,109.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,206.42 : 3,310.39 = 1,109.89 : x
2. Step 2: Convert to fraction form
   2,206.42/3,310.39 = 1,109.89/x
3. Step 3: Cross multiply
   2,206.42x = 3,310.39 × 1,109.89
4. Step 4: Simplify right side
   2,206.42x = 3,674,168.76
5. Step 5: Solve for x
   x = 3,674,168.76/2,206.42
6. Step 6: Final answer
   x = 1,665.22