Finding the Fourth Proportional to 2,629.72, 3,629 and 1,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.72 : 3,629 = 1,434.78 : x
2. Step 2: Convert to fraction form
   2,629.72/3,629 = 1,434.78/x
3. Step 3: Cross multiply
   2,629.72x = 3,629 × 1,434.78
4. Step 4: Simplify right side
   2,629.72x = 5,206,816.62
5. Step 5: Solve for x
   x = 5,206,816.62/2,629.72
6. Step 6: Final answer
   x = 1,979.99