Finding the Fourth Proportional to 2,109.06, 3,162.04 and 1,121.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.06 : 3,162.04 = 1,121.22 : x
2. Step 2: Convert to fraction form
   2,109.06/3,162.04 = 1,121.22/x
3. Step 3: Cross multiply
   2,109.06x = 3,162.04 × 1,121.22
4. Step 4: Simplify right side
   2,109.06x = 3,545,342.49
5. Step 5: Solve for x
   x = 3,545,342.49/2,109.06
6. Step 6: Final answer
   x = 1,681.01