Finding the Fourth Proportional to 1,721.81, 2,576.55 and 1,491.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.81 : 2,576.55 = 1,491.49 : x
2. Step 2: Convert to fraction form
   1,721.81/2,576.55 = 1,491.49/x
3. Step 3: Cross multiply
   1,721.81x = 2,576.55 × 1,491.49
4. Step 4: Simplify right side
   1,721.81x = 3,842,898.56
5. Step 5: Solve for x
   x = 3,842,898.56/1,721.81
6. Step 6: Final answer
   x = 2,231.89