Finding the Fourth Proportional to 2,646.43, 3,969.61 and 672.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.43 : 3,969.61 = 672.06 : x
2. Step 2: Convert to fraction form
   2,646.43/3,969.61 = 672.06/x
3. Step 3: Cross multiply
   2,646.43x = 3,969.61 × 672.06
4. Step 4: Simplify right side
   2,646.43x = 2,667,816.10
5. Step 5: Solve for x
   x = 2,667,816.10/2,646.43
6. Step 6: Final answer
   x = 1,008.08