Finding the Fourth Proportional to 2,290.63, 3,160.90 and 1,406.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.63 : 3,160.90 = 1,406.45 : x
2. Step 2: Convert to fraction form
   2,290.63/3,160.90 = 1,406.45/x
3. Step 3: Cross multiply
   2,290.63x = 3,160.90 × 1,406.45
4. Step 4: Simplify right side
   2,290.63x = 4,445,635.52
5. Step 5: Solve for x
   x = 4,445,635.52/2,290.63
6. Step 6: Final answer
   x = 1,940.79