Finding the Fourth Proportional to 2,132.72, 3,199.80 and 672.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.72 : 3,199.80 = 672.08 : x
2. Step 2: Convert to fraction form
   2,132.72/3,199.80 = 672.08/x
3. Step 3: Cross multiply
   2,132.72x = 3,199.80 × 672.08
4. Step 4: Simplify right side
   2,132.72x = 2,150,521.58
5. Step 5: Solve for x
   x = 2,150,521.58/2,132.72
6. Step 6: Final answer
   x = 1,008.35