Finding the Fourth Proportional to 2,190.56, 3,022.42 and 1,305.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.56 : 3,022.42 = 1,305.88 : x
2. Step 2: Convert to fraction form
   2,190.56/3,022.42 = 1,305.88/x
3. Step 3: Cross multiply
   2,190.56x = 3,022.42 × 1,305.88
4. Step 4: Simplify right side
   2,190.56x = 3,946,917.83
5. Step 5: Solve for x
   x = 3,946,917.83/2,190.56
6. Step 6: Final answer
   x = 1,801.78