Finding the Fourth Proportional to 2,189.66, 3,022.20 and 1,392.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.66 : 3,022.20 = 1,392.82 : x
2. Step 2: Convert to fraction form
   2,189.66/3,022.20 = 1,392.82/x
3. Step 3: Cross multiply
   2,189.66x = 3,022.20 × 1,392.82
4. Step 4: Simplify right side
   2,189.66x = 4,209,380.60
5. Step 5: Solve for x
   x = 4,209,380.60/2,189.66
6. Step 6: Final answer
   x = 1,922.39