Finding the Fourth Proportional to 2,149.16, 3,219.42 and 1,121

Step by Step Solution

1. Step 1: Write the proportion equation
   2,149.16 : 3,219.42 = 1,121 : x
2. Step 2: Convert to fraction form
   2,149.16/3,219.42 = 1,121/x
3. Step 3: Cross multiply
   2,149.16x = 3,219.42 × 1,121
4. Step 4: Simplify right side
   2,149.16x = 3,608,969.82
5. Step 5: Solve for x
   x = 3,608,969.82/2,149.16
6. Step 6: Final answer
   x = 1,679.25