Finding the Fourth Proportional to 2,290.34, 3,160.72 and 1,405.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.34 : 3,160.72 = 1,405.82 : x
2. Step 2: Convert to fraction form
   2,290.34/3,160.72 = 1,405.82/x
3. Step 3: Cross multiply
   2,290.34x = 3,160.72 × 1,405.82
4. Step 4: Simplify right side
   2,290.34x = 4,443,413.05
5. Step 5: Solve for x
   x = 4,443,413.05/2,290.34
6. Step 6: Final answer
   x = 1,940.06