Finding the Fourth Proportional to 3,519.89, 5,281.37 and 1,672.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,519.89 : 5,281.37 = 1,672.31 : x
2. Step 2: Convert to fraction form
   3,519.89/5,281.37 = 1,672.31/x
3. Step 3: Cross multiply
   3,519.89x = 5,281.37 × 1,672.31
4. Step 4: Simplify right side
   3,519.89x = 8,832,087.86
5. Step 5: Solve for x
   x = 8,832,087.86/3,519.89
6. Step 6: Final answer
   x = 2,509.19