Finding the Fourth Proportional to 2,290.41, 3,160.82 and 1,405.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.41 : 3,160.82 = 1,405.71 : x
2. Step 2: Convert to fraction form
   2,290.41/3,160.82 = 1,405.71/x
3. Step 3: Cross multiply
   2,290.41x = 3,160.82 × 1,405.71
4. Step 4: Simplify right side
   2,290.41x = 4,443,199.80
5. Step 5: Solve for x
   x = 4,443,199.80/2,290.41
6. Step 6: Final answer
   x = 1,939.91