Finding the Fourth Proportional to 2,290.75, 3,161.33 and 1,406.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.75 : 3,161.33 = 1,406.84 : x
2. Step 2: Convert to fraction form
   2,290.75/3,161.33 = 1,406.84/x
3. Step 3: Cross multiply
   2,290.75x = 3,161.33 × 1,406.84
4. Step 4: Simplify right side
   2,290.75x = 4,447,470.15
5. Step 5: Solve for x
   x = 4,447,470.15/2,290.75
6. Step 6: Final answer
   x = 1,941.49