Finding the Fourth Proportional to 2,890.56, 3,991.40 and 1,830.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.56 : 3,991.40 = 1,830.19 : x
2. Step 2: Convert to fraction form
   2,890.56/3,991.40 = 1,830.19/x
3. Step 3: Cross multiply
   2,890.56x = 3,991.40 × 1,830.19
4. Step 4: Simplify right side
   2,890.56x = 7,305,020.37
5. Step 5: Solve for x
   x = 7,305,020.37/2,890.56
6. Step 6: Final answer
   x = 2,527.20