Finding the Fourth Proportional to 3,431.40, 5,145.55 and 1,090.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,431.40 : 5,145.55 = 1,090.96 : x
2. Step 2: Convert to fraction form
   3,431.40/5,145.55 = 1,090.96/x
3. Step 3: Cross multiply
   3,431.40x = 5,145.55 × 1,090.96
4. Step 4: Simplify right side
   3,431.40x = 5,613,589.23
5. Step 5: Solve for x
   x = 5,613,589.23/3,431.40
6. Step 6: Final answer
   x = 1,635.95