Finding the Fourth Proportional to 2,045.49, 3,069.57 and 1,121.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.49 : 3,069.57 = 1,121.69 : x
2. Step 2: Convert to fraction form
   2,045.49/3,069.57 = 1,121.69/x
3. Step 3: Cross multiply
   2,045.49x = 3,069.57 × 1,121.69
4. Step 4: Simplify right side
   2,045.49x = 3,443,105.97
5. Step 5: Solve for x
   x = 3,443,105.97/2,045.49
6. Step 6: Final answer
   x = 1,683.27