Finding the Fourth Proportional to 2,680.90, 4,022.50 and 1,121.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,680.90 : 4,022.50 = 1,121.27 : x
2. Step 2: Convert to fraction form
   2,680.90/4,022.50 = 1,121.27/x
3. Step 3: Cross multiply
   2,680.90x = 4,022.50 × 1,121.27
4. Step 4: Simplify right side
   2,680.90x = 4,510,282.86
5. Step 5: Solve for x
   x = 4,510,282.86/2,680.90
6. Step 6: Final answer
   x = 1,682.38