Finding the Fourth Proportional to 2,133.69, 3,199.41 and 672.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,133.69 : 3,199.41 = 672.45 : x
2. Step 2: Convert to fraction form
   2,133.69/3,199.41 = 672.45/x
3. Step 3: Cross multiply
   2,133.69x = 3,199.41 × 672.45
4. Step 4: Simplify right side
   2,133.69x = 2,151,443.25
5. Step 5: Solve for x
   x = 2,151,443.25/2,133.69
6. Step 6: Final answer
   x = 1,008.32