Finding the Fourth Proportional to 2,045.30, 3,064.43 and 1,121.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.30 : 3,064.43 = 1,121.55 : x
2. Step 2: Convert to fraction form
   2,045.30/3,064.43 = 1,121.55/x
3. Step 3: Cross multiply
   2,045.30x = 3,064.43 × 1,121.55
4. Step 4: Simplify right side
   2,045.30x = 3,436,902.78
5. Step 5: Solve for x
   x = 3,436,902.78/2,045.30
6. Step 6: Final answer
   x = 1,680.39