Finding the Fourth Proportional to 2,669.82, 4,004.58 and 721.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.82 : 4,004.58 = 721.89 : x
2. Step 2: Convert to fraction form
   2,669.82/4,004.58 = 721.89/x
3. Step 3: Cross multiply
   2,669.82x = 4,004.58 × 721.89
4. Step 4: Simplify right side
   2,669.82x = 2,890,866.26
5. Step 5: Solve for x
   x = 2,890,866.26/2,669.82
6. Step 6: Final answer
   x = 1,082.79