Finding the Fourth Proportional to 2,190.71, 3,021.77 and 1,339.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.71 : 3,021.77 = 1,339.56 : x
2. Step 2: Convert to fraction form
   2,190.71/3,021.77 = 1,339.56/x
3. Step 3: Cross multiply
   2,190.71x = 3,021.77 × 1,339.56
4. Step 4: Simplify right side
   2,190.71x = 4,047,835.52
5. Step 5: Solve for x
   x = 4,047,835.52/2,190.71
6. Step 6: Final answer
   x = 1,847.73