Finding the Fourth Proportional to 2,190.80, 3,023.37 and 1,306.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.80 : 3,023.37 = 1,306.49 : x
2. Step 2: Convert to fraction form
   2,190.80/3,023.37 = 1,306.49/x
3. Step 3: Cross multiply
   2,190.80x = 3,023.37 × 1,306.49
4. Step 4: Simplify right side
   2,190.80x = 3,949,987.55
5. Step 5: Solve for x
   x = 3,949,987.55/2,190.80
6. Step 6: Final answer
   x = 1,802.99