Finding the Fourth Proportional to 2,007.74, 2,770.72 and 1,211.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.74 : 2,770.72 = 1,211.11 : x
2. Step 2: Convert to fraction form
   2,007.74/2,770.72 = 1,211.11/x
3. Step 3: Cross multiply
   2,007.74x = 2,770.72 × 1,211.11
4. Step 4: Simplify right side
   2,007.74x = 3,355,636.74
5. Step 5: Solve for x
   x = 3,355,636.74/2,007.74
6. Step 6: Final answer
   x = 1,671.35