Finding the Fourth Proportional to 3,570.43, 5,357.17 and 1,380.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,570.43 : 5,357.17 = 1,380.69 : x
2. Step 2: Convert to fraction form
   3,570.43/5,357.17 = 1,380.69/x
3. Step 3: Cross multiply
   3,570.43x = 5,357.17 × 1,380.69
4. Step 4: Simplify right side
   3,570.43x = 7,396,591.05
5. Step 5: Solve for x
   x = 7,396,591.05/3,570.43
6. Step 6: Final answer
   x = 2,071.63