Finding the Fourth Proportional to 3,912.74, 5,871.00 and 1,721.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.74 : 5,871.00 = 1,721.18 : x
2. Step 2: Convert to fraction form
   3,912.74/5,871.00 = 1,721.18/x
3. Step 3: Cross multiply
   3,912.74x = 5,871.00 × 1,721.18
4. Step 4: Simplify right side
   3,912.74x = 10,105,068.91
5. Step 5: Solve for x
   x = 10,105,068.91/3,912.74
6. Step 6: Final answer
   x = 2,582.61