Finding the Fourth Proportional to 2,190.42, 3,022.81 and 1,306.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.42 : 3,022.81 = 1,306.73 : x
2. Step 2: Convert to fraction form
   2,190.42/3,022.81 = 1,306.73/x
3. Step 3: Cross multiply
   2,190.42x = 3,022.81 × 1,306.73
4. Step 4: Simplify right side
   2,190.42x = 3,950,000.80
5. Step 5: Solve for x
   x = 3,950,000.80/2,190.42
6. Step 6: Final answer
   x = 1,803.31