Finding the Fourth Proportional to 2,097.09, 3,142.71 and 1,121.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.09 : 3,142.71 = 1,121.22 : x
2. Step 2: Convert to fraction form
   2,097.09/3,142.71 = 1,121.22/x
3. Step 3: Cross multiply
   2,097.09x = 3,142.71 × 1,121.22
4. Step 4: Simplify right side
   2,097.09x = 3,523,669.31
5. Step 5: Solve for x
   x = 3,523,669.31/2,097.09
6. Step 6: Final answer
   x = 1,680.27