Finding the Fourth Proportional to 2,189.42, 3,020.55 and 1,403.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.42 : 3,020.55 = 1,403.90 : x
2. Step 2: Convert to fraction form
   2,189.42/3,020.55 = 1,403.90/x
3. Step 3: Cross multiply
   2,189.42x = 3,020.55 × 1,403.90
4. Step 4: Simplify right side
   2,189.42x = 4,240,550.15
5. Step 5: Solve for x
   x = 4,240,550.15/2,189.42
6. Step 6: Final answer
   x = 1,936.84