Finding the Fourth Proportional to 2,132.50, 3,199.17 and 671.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.50 : 3,199.17 = 671.31 : x
2. Step 2: Convert to fraction form
   2,132.50/3,199.17 = 671.31/x
3. Step 3: Cross multiply
   2,132.50x = 3,199.17 × 671.31
4. Step 4: Simplify right side
   2,132.50x = 2,147,618.82
5. Step 5: Solve for x
   x = 2,147,618.82/2,132.50
6. Step 6: Final answer
   x = 1,007.09