Finding the Fourth Proportional to 3,573.86, 5,358.89 and 1,380.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,573.86 : 5,358.89 = 1,380.38 : x
2. Step 2: Convert to fraction form
   3,573.86/5,358.89 = 1,380.38/x
3. Step 3: Cross multiply
   3,573.86x = 5,358.89 × 1,380.38
4. Step 4: Simplify right side
   3,573.86x = 7,397,281.23
5. Step 5: Solve for x
   x = 7,397,281.23/3,573.86
6. Step 6: Final answer
   x = 2,069.83