Finding the Fourth Proportional to 3,571.98, 5,358.17 and 1,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,571.98 : 5,358.17 = 1,380.72 : x
2. Step 2: Convert to fraction form
   3,571.98/5,358.17 = 1,380.72/x
3. Step 3: Cross multiply
   3,571.98x = 5,358.17 × 1,380.72
4. Step 4: Simplify right side
   3,571.98x = 7,398,132.48
5. Step 5: Solve for x
   x = 7,398,132.48/3,571.98
6. Step 6: Final answer
   x = 2,071.16