Finding the Fourth Proportional to 2,133.30, 3,199.01 and 672.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,133.30 : 3,199.01 = 672.20 : x
2. Step 2: Convert to fraction form
   2,133.30/3,199.01 = 672.20/x
3. Step 3: Cross multiply
   2,133.30x = 3,199.01 × 672.20
4. Step 4: Simplify right side
   2,133.30x = 2,150,355.17
5. Step 5: Solve for x
   x = 2,150,355.17/2,133.30
6. Step 6: Final answer
   x = 1,007.99