Finding the Fourth Proportional to 2,290.92, 3,162.78 and 1,406.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.92 : 3,162.78 = 1,406.76 : x
2. Step 2: Convert to fraction form
   2,290.92/3,162.78 = 1,406.76/x
3. Step 3: Cross multiply
   2,290.92x = 3,162.78 × 1,406.76
4. Step 4: Simplify right side
   2,290.92x = 4,449,272.39
5. Step 5: Solve for x
   x = 4,449,272.39/2,290.92
6. Step 6: Final answer
   x = 1,942.13