Finding the Fourth Proportional to 2,132.80, 3,199.30 and 672.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.80 : 3,199.30 = 672.06 : x
2. Step 2: Convert to fraction form
   2,132.80/3,199.30 = 672.06/x
3. Step 3: Cross multiply
   2,132.80x = 3,199.30 × 672.06
4. Step 4: Simplify right side
   2,132.80x = 2,150,131.88
5. Step 5: Solve for x
   x = 2,150,131.88/2,132.80
6. Step 6: Final answer
   x = 1,008.13