Finding the Fourth Proportional to 3,574.40, 5,361.34 and 1,109.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,574.40 : 5,361.34 = 1,109.15 : x
2. Step 2: Convert to fraction form
   3,574.40/5,361.34 = 1,109.15/x
3. Step 3: Cross multiply
   3,574.40x = 5,361.34 × 1,109.15
4. Step 4: Simplify right side
   3,574.40x = 5,946,524.72
5. Step 5: Solve for x
   x = 5,946,524.72/3,574.40
6. Step 6: Final answer
   x = 1,663.65